text: /*
     +----------------------------------------------------------------------+
     | Zend OPcache                                                         |
     +----------------------------------------------------------------------+
     | Copyright (c) 1998-2015 The PHP Group                                |
     +----------------------------------------------------------------------+
     | This source file is subject to version 3.01 of the PHP license,      |
     | that is bundled with this package in the file LICENSE, and is        |
     | available through the world-wide-web at the following url:           |
     | http://www.php.net/license/3_01.txt                                  |
     | If you did not receive a copy of the PHP license and are unable to   |
     | obtain it through the world-wide-web, please send a note to          |
     | license@php.net so we can mail you a copy immediately.               |
     +----------------------------------------------------------------------+
     | Authors: Andi Gutmans <andi@zend.com>                                |
     |          Zeev Suraski <zeev@zend.com>                                |
     |          Stanislav Malyshev <stas@zend.com>                          |
     |          Dmitry Stogov <dmitry@zend.com>                             |
     +----------------------------------------------------------------------+
  */
  
  #include "main/php.h"
  #include "main/php_globals.h"
  #include "zend.h"
  #include "zend_extensions.h"
  #include "zend_compile.h"
  #include "ZendAccelerator.h"
  #include "zend_persist.h"
  #include "zend_shared_alloc.h"
  #include "zend_accelerator_module.h"
  #include "zend_accelerator_blacklist.h"
  #include "zend_list.h"
  #include "zend_execute.h"
  #include "main/SAPI.h"
  #include "main/php_streams.h"
  #include "main/php_open_temporary_file.h"
  #include "zend_API.h"
  #include "zend_ini.h"
  #include "zend_virtual_cwd.h"
  #include "zend_accelerator_util_funcs.h"
  #include "zend_accelerator_hash.h"
  #include "ext/pcre/php_pcre.h"
  #include "ext/standard/md5.h"
  
  #ifdef HAVE_OPCACHE_FILE_CACHE
  # include "zend_file_cache.h"
  #endif
  
  #ifndef ZEND_WIN32
  #include  <netdb.h>
  #endif
  
  #ifdef ZEND_WIN32
  typedef int uid_t;
  typedef int gid_t;
  #include <io.h>
  #endif
  
  #ifndef ZEND_WIN32
  # include <sys/time.h>
  #else
  # include <process.h>
  #endif
  
  #ifdef HAVE_UNISTD_H
  # include <unistd.h>
  #endif
  #include <fcntl.h>
  #include <signal.h>
  #include <time.h>
  
  #ifndef ZEND_WIN32
  # include <sys/types.h>
  # include <sys/ipc.h>
  #endif
  
  #include <sys/stat.h>
  #include <errno.h>
  
  #define SHM_PROTECT() \
  	do { \
  		if (ZCG(accel_directives).protect_memory) { \
  			zend_accel_shared_protect(1); \
  		} \
  	} while (0)
  #define SHM_UNPROTECT() \
  	do { \
  		if (ZCG(accel_directives).protect_memory) { \
  			zend_accel_shared_protect(0); \
  		} \
  	} while (0)
  
  ZEND_EXTENSION();
  
  #ifndef ZTS
  zend_accel_globals accel_globals;
  #else
  int accel_globals_id;
  #if defined(COMPILE_DL_OPCACHE)
  ZEND_TSRMLS_CACHE_DEFINE();
  #endif
  #endif
  
  /* Points to the structure shared across all PHP processes */
  zend_accel_shared_globals *accel_shared_globals = NULL;
  
  /* true globals, no need for thread safety */
  zend_bool accel_startup_ok = 0;
  static char *zps_failure_reason = NULL;
  char *zps_api_failure_reason = NULL;
  #if ENABLE_FILE_CACHE_FALLBACK
  zend_bool fallback_process = 0; /* process uses file cache fallback */
  #endif
  
  static zend_op_array *(*accelerator_orig_compile_file)(zend_file_handle *file_handle, int type);
  static int (*accelerator_orig_zend_stream_open_function)(const char *filename, zend_file_handle *handle );
  static zend_string *(*accelerator_orig_zend_resolve_path)(const char *filename, int filename_len);
  static void (*orig_chdir)(INTERNAL_FUNCTION_PARAMETERS) = NULL;
  static ZEND_INI_MH((*orig_include_path_on_modify)) = NULL;
  
  #ifdef ZEND_WIN32
  # define INCREMENT(v) InterlockedIncrement64(&ZCSG(v))
  # define DECREMENT(v) InterlockedDecrement64(&ZCSG(v))
  # define LOCKVAL(v)   (ZCSG(v))
  #endif
  
  #ifdef ZEND_WIN32
  static time_t zend_accel_get_time(void)
  {
  	FILETIME now;
  	GetSystemTimeAsFileTime(&now);
  
  	return (time_t) ((((((__int64)now.dwHighDateTime) << 32)|now.dwLowDateTime) - 116444736000000000L)/10000000);
  }
  #else
  # define zend_accel_get_time() time(NULL)
  #endif
  
  static inline int is_stream_path(const char *filename)
  {
  	const char *p;
  
  	for (p = filename;
  	     (*p >= 'a' && *p <= 'z') ||
  	     (*p >= 'A' && *p <= 'Z') ||
  	     (*p >= '0' && *p <= '9') ||
  	     *p == '+' || *p == '-' || *p == '.';
  	     p++);
  	return ((p != filename) && (p[0] == ':') && (p[1] == '/') && (p[2] == '/'));
  }
  
  static inline int is_cacheable_stream_path(const char *filename)
  {
  	return memcmp(filename, "file://", sizeof("file://") - 1) == 0 ||
  	       memcmp(filename, "phar://", sizeof("phar://") - 1) == 0;
  }
  
  /* O+ overrides PHP chdir() function and remembers the current working directory
   * in ZCG(cwd) and ZCG(cwd_len). Later accel_getcwd() can use stored value and
   * avoid getcwd() call.
   */
  static ZEND_FUNCTION(accel_chdir)
  {
  	char cwd[MAXPATHLEN];
  
  	orig_chdir(INTERNAL_FUNCTION_PARAM_PASSTHRU);
  	if (VCWD_GETCWD(cwd, MAXPATHLEN)) {
  		if (ZCG(cwd)) {
  			zend_string_release(ZCG(cwd));
  		}
  		ZCG(cwd) = zend_string_init(cwd, strlen(cwd), 0);
  	} else {
  		if (ZCG(cwd)) {
  			zend_string_release(ZCG(cwd));
  			ZCG(cwd) = NULL;
  		}
  	}
  	ZCG(cwd_key_len) = 0;
  	ZCG(cwd_check) = 1;
  }
  
  static inline zend_string* accel_getcwd(void)
  {
  	if (ZCG(cwd)) {
  		return ZCG(cwd);
  	} else {
  		char cwd[MAXPATHLEN + 1];
  
  		if (!VCWD_GETCWD(cwd, MAXPATHLEN)) {
  			return NULL;
  		}
  		ZCG(cwd) = zend_string_init(cwd, strlen(cwd), 0);
  		ZCG(cwd_key_len) = 0;
  		ZCG(cwd_check) = 1;
  		return ZCG(cwd);
  	}
  }
  
  void zend_accel_schedule_restart_if_necessary(zend_accel_restart_reason reason)
  {
  	if ((((double) ZSMMG(wasted_shared_memory)) / ZCG(accel_directives).memory_consumption) >= ZCG(accel_directives).max_wasted_percentage) {
   		zend_accel_schedule_restart(reason);
  	}
  }
  
  /* O+ tracks changes of "include_path" directive. It stores all the requested
   * values in ZCG(include_paths) shared hash table, current value in
   * ZCG(include_path)/ZCG(include_path_len) and one letter "path key" in
   * ZCG(include_path_key).
   */
  static ZEND_INI_MH(accel_include_path_on_modify)
  {
  	int ret = orig_include_path_on_modify(entry, new_value, mh_arg1, mh_arg2, mh_arg3, stage);
  
  	if (ret == SUCCESS) {
  		ZCG(include_path) = new_value;
  		ZCG(include_path_key_len) = 0;
  		ZCG(include_path_check) = 1;
  	}
  	return ret;
  }
  
  /* Interned strings support */
  static zend_string *(*orig_new_interned_string)(zend_string *str);
  static void (*orig_interned_strings_snapshot)(void);
  static void (*orig_interned_strings_restore)(void);
  
  /* O+ disables creation of interned strings by regular PHP compiler, instead,
   * it creates interned strings in shared memory when saves a script.
   * Such interned strings are shared across all PHP processes
   */
  static zend_string *accel_new_interned_string_for_php(zend_string *str)
  {
  	return str;
  }
  
  static void accel_interned_strings_snapshot_for_php(void)
  {
  }
  
  static void accel_interned_strings_restore_for_php(void)
  {
  }
  
  #ifndef ZTS
  static void accel_interned_strings_restore_state(void)
  {
      uint idx = ZCSG(interned_strings).nNumUsed;
      uint nIndex;
      Bucket *p;
  
  	memset(ZCSG(interned_strings_saved_top),
  			0, ZCSG(interned_strings_top) - ZCSG(interned_strings_saved_top));
  	ZCSG(interned_strings_top) = ZCSG(interned_strings_saved_top);
      while (idx > 0) {
      	idx--;
  		p = ZCSG(interned_strings).arData + idx;
  		if ((char*)p->key < ZCSG(interned_strings_top)) break;
  		ZCSG(interned_strings).nNumUsed--;
  		ZCSG(interned_strings).nNumOfElements--;
  
  		nIndex = p->h | ZCSG(interned_strings).nTableMask;
  		if (HT_HASH(&ZCSG(interned_strings), nIndex) == HT_IDX_TO_HASH(idx)) {
  			HT_HASH(&ZCSG(interned_strings), nIndex) = Z_NEXT(p->val);
  		} else {
  			uint32_t prev = HT_HASH(&ZCSG(interned_strings), nIndex);
  			while (Z_NEXT(HT_HASH_TO_BUCKET(&ZCSG(interned_strings), prev)->val) != idx) {
  				prev = Z_NEXT(HT_HASH_TO_BUCKET(&ZCSG(interned_strings), prev)->val);
   			}
  			Z_NEXT(HT_HASH_TO_BUCKET(&ZCSG(interned_strings), prev)->val) = Z_NEXT(p->val);
   		}
  	}
  }
  
  static void accel_interned_strings_save_state(void)
  {
  	ZCSG(interned_strings_saved_top) = ZCSG(interned_strings_top);
  }
  #endif
  
  #ifndef ZTS
  static zend_string *accel_find_interned_string(zend_string *str)
  {
  /* for now interned strings are supported only for non-ZTS build */
  	zend_ulong h;
  	uint nIndex;
  	uint idx;
  	Bucket *arData, *p;
  
  	if (IS_ACCEL_INTERNED(str)) {
  		/* this is already an interned string */
  		return str;
  	}
  
  	h = zend_string_hash_val(str);
  	nIndex = h | ZCSG(interned_strings).nTableMask;
  
  	/* check for existing interned string */
  	idx = HT_HASH(&ZCSG(interned_strings), nIndex);
  	arData = ZCSG(interned_strings).arData;
  	while (idx != HT_INVALID_IDX) {
  		p = HT_HASH_TO_BUCKET_EX(arData, idx);
  		if ((p->h == h) && (ZSTR_LEN(p->key) == ZSTR_LEN(str))) {
  			if (!memcmp(ZSTR_VAL(p->key), ZSTR_VAL(str), ZSTR_LEN(str))) {
  				return p->key;
  			}
  		}
  		idx = Z_NEXT(p->val);
  	}
  
  	return NULL;
  }
  #endif
  
  zend_string *accel_new_interned_string(zend_string *str)
  {
  /* for now interned strings are supported only for non-ZTS build */
  #ifndef ZTS
  	zend_ulong h;
  	uint nIndex;
  	uint idx;
  	Bucket *p;
  
  #ifdef HAVE_OPCACHE_FILE_CACHE
  	if (ZCG(accel_directives).file_cache_only) {
  		return str;
  	}
  #endif
  
  	if (IS_ACCEL_INTERNED(str)) {
  		/* this is already an interned string */
  		return str;
  	}
  
  	h = zend_string_hash_val(str);
  	nIndex = h | ZCSG(interned_strings).nTableMask;
  
  	/* check for existing interned string */
  	idx = HT_HASH(&ZCSG(interned_strings), nIndex);
  	while (idx != HT_INVALID_IDX) {
  		p = HT_HASH_TO_BUCKET(&ZCSG(interned_strings), idx);
  		if ((p->h == h) && (ZSTR_LEN(p->key) == ZSTR_LEN(str))) {
  			if (!memcmp(ZSTR_VAL(p->key), ZSTR_VAL(str), ZSTR_LEN(str))) {
  				zend_string_release(str);
  				return p->key;
  			}
  		}
  		idx = Z_NEXT(p->val);
  	}
  
  	if (ZCSG(interned_strings_top) + ZEND_MM_ALIGNED_SIZE(_ZSTR_STRUCT_SIZE(ZSTR_LEN(str))) >=
  	    ZCSG(interned_strings_end)) {
  	    /* no memory, return the same non-interned string */
  		zend_accel_error(ACCEL_LOG_WARNING, "Interned string buffer overflow");
  		return str;
  	}
  
  	/* create new interning string in shared interned strings buffer */
  
  	idx = ZCSG(interned_strings).nNumUsed++;
  	ZCSG(interned_strings).nNumOfElements++;
  	p = ZCSG(interned_strings).arData + idx;
  	p->key = (zend_string*) ZCSG(interned_strings_top);
  	ZCSG(interned_strings_top) += ZEND_MM_ALIGNED_SIZE(_ZSTR_STRUCT_SIZE(ZSTR_LEN(str)));
  	p->h = h;
  	GC_REFCOUNT(p->key) = 1;
  #if 1
  	/* optimized single assignment */
  	GC_TYPE_INFO(p->key) = IS_STRING | ((IS_STR_INTERNED | IS_STR_PERMANENT) << 8);
  #else
  	GC_TYPE(p->key) = IS_STRING;
  	GC_FLAGS(p->key) = IS_STR_INTERNED | IS_STR_PERMANENT;
  #endif
  	ZSTR_H(p->key) = ZSTR_H(str);
  	ZSTR_LEN(p->key) = ZSTR_LEN(str);
  	memcpy(ZSTR_VAL(p->key), ZSTR_VAL(str), ZSTR_LEN(str));
  	ZVAL_INTERNED_STR(&p->val, p->key);
  	Z_NEXT(p->val) = HT_HASH(&ZCSG(interned_strings), nIndex);
  	HT_HASH(&ZCSG(interned_strings), nIndex) = HT_IDX_TO_HASH(idx);
  	zend_string_release(str);
  	return p->key;
  #else
  	return str;
  #endif
  }
  
  #ifndef ZTS
  /* Copy PHP interned strings from PHP process memory into the shared memory */
  static void accel_use_shm_interned_strings(void)
  {
  	uint idx, j;
  	Bucket *p, *q;
  
  	/* empty string */
  	CG(empty_string) = accel_new_interned_string(CG(empty_string));
  	for (j = 0; j < 256; j++) {
  		char s[2];
  		s[0] = j;
  		s[1] = 0;
  		CG(one_char_string)[j] = accel_new_interned_string(zend_string_init(s, 1, 0));
  	}
  
  	/* function table hash keys */
  	for (idx = 0; idx < CG(function_table)->nNumUsed; idx++) {
  		p = CG(function_table)->arData + idx;
  		if (Z_TYPE(p->val) == IS_UNDEF) continue;
  		if (p->key) {
  			p->key = accel_new_interned_string(p->key);
  		}
  		if (Z_FUNC(p->val)->common.function_name) {
  			Z_FUNC(p->val)->common.function_name = accel_new_interned_string(Z_FUNC(p->val)->common.function_name);
  		}
  	}
  
  	/* class table hash keys, class names, properties, methods, constants, etc */
  	for (idx = 0; idx < CG(class_table)->nNumUsed; idx++) {
  		zend_class_entry *ce;
  
  		p = CG(class_table)->arData + idx;
  		if (Z_TYPE(p->val) == IS_UNDEF) continue;
  		ce = (zend_class_entry*)Z_PTR(p->val);
  
  		if (p->key) {
  			p->key = accel_new_interned_string(p->key);
  		}
  
  		if (ce->name) {
  			ce->name = accel_new_interned_string(ce->name);
  		}
  
  		for (j = 0; j < ce->properties_info.nNumUsed; j++) {
  			zend_property_info *info;
  
  			q = ce->properties_info.arData + j;
  			if (Z_TYPE(q->val) == IS_UNDEF) continue;
  
  			info = (zend_property_info*)Z_PTR(q->val);
  
  			if (q->key) {
  				q->key = accel_new_interned_string(q->key);
  			}
  
  			if (info->name) {
  				info->name = accel_new_interned_string(info->name);
  			}
  		}
  
  		for (j = 0; j < ce->function_table.nNumUsed; j++) {
  			q = ce->function_table.arData + j;
  			if (Z_TYPE(q->val) == IS_UNDEF) continue;
  			if (q->key) {
  				q->key = accel_new_interned_string(q->key);
  			}
  			if (Z_FUNC(q->val)->common.function_name) {
  				Z_FUNC(q->val)->common.function_name = accel_new_interned_string(Z_FUNC(q->val)->common.function_name);
  			}
  		}
  
  		for (j = 0; j < ce->constants_table.nNumUsed; j++) {
  			q = ce->constants_table.arData + j;
  			if (!Z_TYPE(q->val) == IS_UNDEF) continue;
  			if (q->key) {
  				q->key = accel_new_interned_string(q->key);
  			}
  		}
  	}
  
  	/* constant hash keys */
  	for (idx = 0; idx < EG(zend_constants)->nNumUsed; idx++) {
  		p = EG(zend_constants)->arData + idx;
  		if (!Z_TYPE(p->val) == IS_UNDEF) continue;
  		if (p->key) {
  			p->key = accel_new_interned_string(p->key);
  		}
  	}
  
  	/* auto globals hash keys and names */
  	for (idx = 0; idx < CG(auto_globals)->nNumUsed; idx++) {
  		zend_auto_global *auto_global;
  
  		p = CG(auto_globals)->arData + idx;
  		if (Z_TYPE(p->val) == IS_UNDEF) continue;
  
  		auto_global = (zend_auto_global*)Z_PTR(p->val);;
  
  		zend_string_addref(auto_global->name);
  		auto_global->name = accel_new_interned_string(auto_global->name);
  		if (p->key) {
  			p->key = accel_new_interned_string(p->key);
  		}
  	}
  }
  #endif
  
  static inline void accel_restart_enter(void)
  {
  #ifdef ZEND_WIN32
  	INCREMENT(restart_in);
  #else
  	static const FLOCK_STRUCTURE(restart_in_progress, F_WRLCK, SEEK_SET, 2, 1);
  
  	if (fcntl(lock_file, F_SETLK, &restart_in_progress) == -1) {
  		zend_accel_error(ACCEL_LOG_DEBUG, "RestartC(+1):  %s (%d)", strerror(errno), errno);
  	}
  #endif
  	ZCSG(restart_in_progress) = 1;
  }
  
  static inline void accel_restart_leave(void)
  {
  #ifdef ZEND_WIN32
  	ZCSG(restart_in_progress) = 0;
  	DECREMENT(restart_in);
  #else
  	static const FLOCK_STRUCTURE(restart_finished, F_UNLCK, SEEK_SET, 2, 1);
  
  	ZCSG(restart_in_progress) = 0;
  	if (fcntl(lock_file, F_SETLK, &restart_finished) == -1) {
  		zend_accel_error(ACCEL_LOG_DEBUG, "RestartC(-1):  %s (%d)", strerror(errno), errno);
  	}
  #endif
  }
  
  static inline int accel_restart_is_active(void)
  {
  	if (ZCSG(restart_in_progress)) {
  #ifndef ZEND_WIN32
  		FLOCK_STRUCTURE(restart_check, F_WRLCK, SEEK_SET, 2, 1);
  
  		if (fcntl(lock_file, F_GETLK, &restart_check) == -1) {
  			zend_accel_error(ACCEL_LOG_DEBUG, "RestartC:  %s (%d)", strerror(errno), errno);
  			return FAILURE;
  		}
  		if (restart_check.l_type == F_UNLCK) {
  			ZCSG(restart_in_progress) = 0;
  			return 0;
  		} else {
  			return 1;
  		}
  #else
  		return LOCKVAL(restart_in) != 0;
  #endif
  	}
  	return 0;
  }
  
  /* Creates a read lock for SHM access */
  static inline void accel_activate_add(void)
  {
  #ifdef ZEND_WIN32
  	INCREMENT(mem_usage);
  #else
  	static const FLOCK_STRUCTURE(mem_usage_lock, F_RDLCK, SEEK_SET, 1, 1);
  
  	if (fcntl(lock_file, F_SETLK, &mem_usage_lock) == -1) {
  		zend_accel_error(ACCEL_LOG_DEBUG, "UpdateC(+1):  %s (%d)", strerror(errno), errno);
  	}
  #endif
  }
  
  /* Releases a lock for SHM access */
  static inline void accel_deactivate_sub(void)
  {
  #ifdef ZEND_WIN32
  	if (ZCG(counted)) {
  		DECREMENT(mem_usage);
  		ZCG(counted) = 0;
  	}
  #else
  	static const FLOCK_STRUCTURE(mem_usage_unlock, F_UNLCK, SEEK_SET, 1, 1);
  
  	if (fcntl(lock_file, F_SETLK, &mem_usage_unlock) == -1) {
  		zend_accel_error(ACCEL_LOG_DEBUG, "UpdateC(-1):  %s (%d)", strerror(errno), errno);
  	}
  #endif
  }
  
  static inline void accel_unlock_all(void)
  {
  #ifdef ZEND_WIN32
  	accel_deactivate_sub();
  #else
  	static const FLOCK_STRUCTURE(mem_usage_unlock_all, F_UNLCK, SEEK_SET, 0, 0);
  
  	if (fcntl(lock_file, F_SETLK, &mem_usage_unlock_all) == -1) {
  		zend_accel_error(ACCEL_LOG_DEBUG, "UnlockAll:  %s (%d)", strerror(errno), errno);
  	}
  #endif
  }
  
  #ifndef ZEND_WIN32
  static inline void kill_all_lockers(struct flock *mem_usage_check)
  {
  	int tries = 10;
  
  	/* so that other process won't try to force while we are busy cleaning up */
  	ZCSG(force_restart_time) = 0;
  	while (mem_usage_check->l_pid > 0) {
  		while (tries--) {
  			zend_accel_error(ACCEL_LOG_ERROR, "Killed locker %d", mem_usage_check->l_pid);
  			if (kill(mem_usage_check->l_pid, SIGKILL)) {
  				break;
  			}
  			/* give it a chance to die */
  			usleep(20000);
  			if (kill(mem_usage_check->l_pid, 0)) {
  				/* can't kill it */
  				break;
  			}
  			usleep(10000);
  		}
  		if (!tries) {
  			zend_accel_error(ACCEL_LOG_ERROR, "Can't kill %d after 20 tries!", mem_usage_check->l_pid);
  			ZCSG(force_restart_time) = time(NULL); /* restore forced restart request */
  		}
  
  		mem_usage_check->l_type = F_WRLCK;
  		mem_usage_check->l_whence = SEEK_SET;
  		mem_usage_check->l_start = 1;
  		mem_usage_check->l_len = 1;
  		mem_usage_check->l_pid = -1;
  		if (fcntl(lock_file, F_GETLK, mem_usage_check) == -1) {
  			zend_accel_error(ACCEL_LOG_DEBUG, "KLockers:  %s (%d)", strerror(errno), errno);
  			break;
  		}
  
  		if (mem_usage_check->l_type == F_UNLCK || mem_usage_check->l_pid <= 0) {
  			break;
  		}
  	}
  }
  #endif
  
  static inline int accel_is_inactive(void)
  {
  #ifdef ZEND_WIN32
  	if (LOCKVAL(mem_usage) == 0) {
  		return SUCCESS;
  	}
  #else
  	FLOCK_STRUCTURE(mem_usage_check, F_WRLCK, SEEK_SET, 1, 1);
  
  	mem_usage_check.l_pid = -1;
  	if (fcntl(lock_file, F_GETLK, &mem_usage_check) == -1) {
  		zend_accel_error(ACCEL_LOG_DEBUG, "UpdateC:  %s (%d)", strerror(errno), errno);
  		return FAILURE;
  	}
  	if (mem_usage_check.l_type == F_UNLCK) {
  		return SUCCESS;
  	}
  
  	if (ZCG(accel_directives).force_restart_timeout
  		&& ZCSG(force_restart_time)
  		&& time(NULL) >= ZCSG(force_restart_time)) {
  		zend_accel_error(ACCEL_LOG_WARNING, "Forced restart at %d (after %d seconds), locked by %d", time(NULL), ZCG(accel_directives).force_restart_timeout, mem_usage_check.l_pid);
  		kill_all_lockers(&mem_usage_check);
  
  		return FAILURE; /* next request should be able to restart it */
  	}
  #endif
  
  	return FAILURE;
  }
  
  static int zend_get_stream_timestamp(const char *filename, zend_stat_t *statbuf)
  {
  	php_stream_wrapper *wrapper;
  	php_stream_statbuf stream_statbuf;
  	int ret, er;
  
  	if (!filename) {
  		return FAILURE;
  	}
  
  	wrapper = php_stream_locate_url_wrapper(filename, NULL, STREAM_LOCATE_WRAPPERS_ONLY);
  	if (!wrapper) {
  		return FAILURE;
  	}
  	if (!wrapper->wops || !wrapper->wops->url_stat) {
  		statbuf->st_mtime = 1;
  		return SUCCESS; /* anything other than 0 is considered to be a valid timestamp */
  	}
  
  	er = EG(error_reporting);
  	EG(error_reporting) = 0;
  	zend_try {
  		ret = wrapper->wops->url_stat(wrapper, (char*)filename, PHP_STREAM_URL_STAT_QUIET, &stream_statbuf, NULL);
  	} zend_catch {
  		ret = -1;
  	} zend_end_try();
  	EG(error_reporting) = er;
  
  	if (ret != 0) {
  		return FAILURE;
  	}
  
  	*statbuf = stream_statbuf.sb;
  	return SUCCESS;
  }
  
  #if ZEND_WIN32
  static accel_time_t zend_get_file_handle_timestamp_win(zend_file_handle *file_handle, size_t *size)
  {
  	static unsigned __int64 utc_base = 0;
  	static FILETIME utc_base_ft;
  	WIN32_FILE_ATTRIBUTE_DATA fdata;
  
  	if (!file_handle->opened_path) {
  		return 0;
  	}
  
  	if (!utc_base) {
  		SYSTEMTIME st;
  
  		st.wYear = 1970;
  		st.wMonth = 1;
  		st.wDay = 1;
  		st.wHour = 0;
  		st.wMinute = 0;
  		st.wSecond = 0;
  		st.wMilliseconds = 0;
  
  		SystemTimeToFileTime (&st, &utc_base_ft);
  		utc_base = (((unsigned __int64)utc_base_ft.dwHighDateTime) << 32) + utc_base_ft.dwLowDateTime;
      }
  
  	if (file_handle->opened_path && GetFileAttributesEx(file_handle->opened_path->val, GetFileExInfoStandard, &fdata) != 0) {
  		unsigned __int64 ftime;
  
  		if (CompareFileTime (&fdata.ftLastWriteTime, &utc_base_ft) < 0) {
  			return 0;
  		}
  
  		ftime = (((unsigned __int64)fdata.ftLastWriteTime.dwHighDateTime) << 32) + fdata.ftLastWriteTime.dwLowDateTime - utc_base;
  		ftime /= 10000000L;
  
  		if (size) {
  			*size = (size_t)((((unsigned __int64)fdata.nFileSizeHigh) << 32) + (unsigned __int64)fdata.nFileSizeLow);
  		}
  		return (accel_time_t)ftime;
  	}
  	return 0;
  }
  #endif
  
  accel_time_t zend_get_file_handle_timestamp(zend_file_handle *file_handle, size_t *size)
  {
  	zend_stat_t statbuf;
  #ifdef ZEND_WIN32
  	accel_time_t res;
  #endif
  
  	if (sapi_module.get_stat &&
  	    !EG(current_execute_data) &&
  	    file_handle->filename == SG(request_info).path_translated) {
  
  		zend_stat_t *tmpbuf = sapi_module.get_stat();
  
  		if (tmpbuf) {
  			if (size) {
  				*size = tmpbuf->st_size;
  			}
  			return tmpbuf->st_mtime;
  		}
  	}
  
  #ifdef ZEND_WIN32
  	res = zend_get_file_handle_timestamp_win(file_handle, size);
  	if (res) {
  		return res;
  	}
  #endif
  
  	switch (file_handle->type) {
  		case ZEND_HANDLE_FD:
  			if (zend_fstat(file_handle->handle.fd, &statbuf) == -1) {
  				return 0;
  			}
  			break;
  		case ZEND_HANDLE_FP:
  			if (zend_fstat(fileno(file_handle->handle.fp), &statbuf) == -1) {
  				if (zend_get_stream_timestamp(file_handle->filename, &statbuf) != SUCCESS) {
  					return 0;
  				}
  			}
  			break;
  		case ZEND_HANDLE_FILENAME:
  		case ZEND_HANDLE_MAPPED:
  			if (file_handle->opened_path) {
  				char *file_path = ZSTR_VAL(file_handle->opened_path);
  
  				if (is_stream_path(file_path)) {
  					if (zend_get_stream_timestamp(file_path, &statbuf) == SUCCESS) {
  						break;
  					}
  				}
  				if (VCWD_STAT(file_path, &statbuf) != -1) {
  					break;
  				}
  			}
  
  			if (zend_get_stream_timestamp(file_handle->filename, &statbuf) != SUCCESS) {
  				return 0;
  			}
  			break;
  		case ZEND_HANDLE_STREAM:
  			{
  				php_stream *stream = (php_stream *)file_handle->handle.stream.handle;
  				php_stream_statbuf sb;
  				int ret, er;
  
  				if (!stream ||
  				    !stream->ops ||
  				    !stream->ops->stat) {
  					return 0;
  				}
  
  				er = EG(error_reporting);
  				EG(error_reporting) = 0;
  				zend_try {
  					ret = stream->ops->stat(stream, &sb);
  				} zend_catch {
  					ret = -1;
  				} zend_end_try();
  				EG(error_reporting) = er;
  				if (ret != 0) {
  					return 0;
  				}
  
  				statbuf = sb.sb;
  			}
  			break;
  
  		default:
  			return 0;
  	}
  
  	if (size) {
  		*size = statbuf.st_size;
  	}
  	return statbuf.st_mtime;
  }
  
  static inline int do_validate_timestamps(zend_persistent_script *persistent_script, zend_file_handle *file_handle)
  {
  	zend_file_handle ps_handle;
  	zend_string *full_path_ptr = NULL;
  
  	/** check that the persistent script is indeed the same file we cached
  	 * (if part of the path is a symlink than it possible that the user will change it)
  	 * See bug #15140
  	 */
  	if (file_handle->opened_path) {
  		if (persistent_script->full_path != file_handle->opened_path &&
  		    (ZSTR_LEN(persistent_script->full_path) != ZSTR_LEN(file_handle->opened_path) ||
  		     memcmp(ZSTR_VAL(persistent_script->full_path), ZSTR_VAL(file_handle->opened_path), ZSTR_LEN(file_handle->opened_path)) != 0)) {
  			return FAILURE;
  		}
  	} else {
  		full_path_ptr = accelerator_orig_zend_resolve_path(file_handle->filename, strlen(file_handle->filename));
  		if (full_path_ptr &&
  		    persistent_script->full_path != full_path_ptr &&
  		    (ZSTR_LEN(persistent_script->full_path) != ZSTR_LEN(full_path_ptr) ||
  		     memcmp(ZSTR_VAL(persistent_script->full_path), ZSTR_VAL(full_path_ptr), ZSTR_LEN(full_path_ptr)) != 0)) {
  			zend_string_release(full_path_ptr);
  			return FAILURE;
  		}
  		file_handle->opened_path = full_path_ptr;
  	}
  
  	if (persistent_script->timestamp == 0) {
  		if (full_path_ptr) {
  			zend_string_release(full_path_ptr);
  			file_handle->opened_path = NULL;
  		}
  		return FAILURE;
  	}
  
  	if (zend_get_file_handle_timestamp(file_handle, NULL) == persistent_script->timestamp) {
  		if (full_path_ptr) {
  			zend_string_release(full_path_ptr);
  			file_handle->opened_path = NULL;
  		}
  		return SUCCESS;
  	}
  	if (full_path_ptr) {
  		zend_string_release(full_path_ptr);
  		file_handle->opened_path = NULL;
  	}
  
  	ps_handle.type = ZEND_HANDLE_FILENAME;
  	ps_handle.filename = ZSTR_VAL(persistent_script->full_path);
  	ps_handle.opened_path = persistent_script->full_path;
  
  	if (zend_get_file_handle_timestamp(&ps_handle, NULL) == persistent_script->timestamp) {
  		return SUCCESS;
  	}
  
  	return FAILURE;
  }
  
  int validate_timestamp_and_record(zend_persistent_script *persistent_script, zend_file_handle *file_handle)
  {
  	if (ZCG(accel_directives).revalidate_freq &&
  	    persistent_script->dynamic_members.revalidate >= ZCG(request_time)) {
  		return SUCCESS;
  	} else if (do_validate_timestamps(persistent_script, file_handle) == FAILURE) {
  		return FAILURE;
  	} else {
  		persistent_script->dynamic_members.revalidate = ZCG(request_time) + ZCG(accel_directives).revalidate_freq;
  		return SUCCESS;
  	}
  }
  
  /* Instead of resolving full real path name each time we need to identify file,
   * we create a key that consist from requested file name, current working
   * directory, current include_path, etc */
  char *accel_make_persistent_key(const char *path, int path_length, int *key_len)
  {
  	int key_length;
  
  	/* CWD and include_path don't matter for absolute file names and streams */
      if (IS_ABSOLUTE_PATH(path, path_length)) {
  		/* pass */
  		ZCG(key_len) = 0;
      } else if (UNEXPECTED(is_stream_path(path))) {
  		if (!is_cacheable_stream_path(path)) {
  			return NULL;
  		}
  		/* pass */
  		ZCG(key_len) = 0;
      } else if (UNEXPECTED(!ZCG(accel_directives).use_cwd)) {
  		/* pass */
  		ZCG(key_len) = 0;
      } else {
  		const char *include_path = NULL, *cwd = NULL;
  		int include_path_len = 0, cwd_len = 0;
  		zend_string *parent_script = NULL;
  		size_t parent_script_len = 0;
  
  		if (EXPECTED(ZCG(cwd_key_len))) {
  			cwd = ZCG(cwd_key);
  			cwd_len = ZCG(cwd_key_len);
  		} else {
  			zend_string *cwd_str = accel_getcwd();
  
  			if (UNEXPECTED(!cwd_str)) {
  				/* we don't handle this well for now. */
  				zend_accel_error(ACCEL_LOG_INFO, "getcwd() failed for '%s' (%d), please try to set opcache.use_cwd to 0 in ini file", path, errno);
  				return NULL;
  			}
  			cwd = ZSTR_VAL(cwd_str);
  			cwd_len = ZSTR_LEN(cwd_str);
  #ifndef ZTS
  			if (ZCG(cwd_check)) {
  				ZCG(cwd_check) = 0;
  				if ((ZCG(counted) || ZCSG(accelerator_enabled))) {
  
  					zend_string *str = accel_find_interned_string(cwd_str);
  					if (!str) {
  						SHM_UNPROTECT();
  						zend_shared_alloc_lock();
  						str = accel_new_interned_string(zend_string_copy(cwd_str));
  						if (str == cwd_str) {
  							str = NULL;
  						}
  						zend_shared_alloc_unlock();
  						SHM_PROTECT();
  					}
  					if (str) {
  						char buf[32];
  						char *res = zend_print_long_to_buf(buf + sizeof(buf) - 1, ZSTR_VAL(str) - ZCSG(interned_strings_start));
  
  						cwd_len = ZCG(cwd_key_len) = buf + sizeof(buf) - 1 - res;
  						cwd = ZCG(cwd_key);
  						memcpy(ZCG(cwd_key), res, cwd_len + 1);
  					}
  				}
  			}
  #endif
  		}
  
  		if (EXPECTED(ZCG(include_path_key_len))) {
  			include_path = ZCG(include_path_key);
  			include_path_len = ZCG(include_path_key_len);
  		} else if (!ZCG(include_path) || ZSTR_LEN(ZCG(include_path)) == 0) {
  			include_path = "";
  			include_path_len = 0;
  		} else {
  			include_path = ZSTR_VAL(ZCG(include_path));
  			include_path_len = ZSTR_LEN(ZCG(include_path));
  
  #ifndef ZTS
  			if (ZCG(include_path_check)) {
  				ZCG(include_path_check) = 0;
  				if ((ZCG(counted) || ZCSG(accelerator_enabled))) {
  
  					zend_string *str = accel_find_interned_string(ZCG(include_path));
  					if (!str) {
  						SHM_UNPROTECT();
  						zend_shared_alloc_lock();
  						str = accel_new_interned_string(zend_string_copy(ZCG(include_path)));
  						if (str == ZCG(include_path)) {
  							str = NULL;
  						}
  						zend_shared_alloc_unlock();
  						SHM_PROTECT();
  					}
  					if (str) {
  						char buf[32];
  						char *res = zend_print_long_to_buf(buf + sizeof(buf) - 1, ZSTR_VAL(str) - ZCSG(interned_strings_start));
  
  						include_path_len = ZCG(include_path_key_len) = buf + sizeof(buf) - 1 - res;
  						include_path = ZCG(include_path_key);
  						memcpy(ZCG(include_path_key), res, include_path_len + 1);
  					}
  				}
  			}
  #endif
  		}
  
  		/* Calculate key length */
  		if (UNEXPECTED((size_t)(cwd_len + path_length + include_path_len + 2) >= sizeof(ZCG(key)))) {
  			return NULL;
  		}
  
  		/* Generate key
  		 * Note - the include_path must be the last element in the key,
  		 * since in itself, it may include colons (which we use to separate
  		 * different components of the key)
  		 */
  		memcpy(ZCG(key), path, path_length);
  		ZCG(key)[path_length] = ':';
  		key_length = path_length + 1;
  		memcpy(ZCG(key) + key_length, cwd, cwd_len);
  		key_length += cwd_len;
  
  		if (include_path_len) {
  			ZCG(key)[key_length] = ':';
  			key_length += 1;
  			memcpy(ZCG(key) + key_length, include_path, include_path_len);
  			key_length += include_path_len;
  		}
  
  		/* Here we add to the key the parent script directory,
  		 * since fopen_wrappers from version 4.0.7 use current script's path
  		 * in include path too.
  		 */
  		if (EXPECTED(EG(current_execute_data)) &&
  		    EXPECTED((parent_script = zend_get_executed_filename_ex()) != NULL)) {
  
  			parent_script_len = ZSTR_LEN(parent_script);
  			while ((--parent_script_len > 0) && !IS_SLASH(ZSTR_VAL(parent_script)[parent_script_len]));
  
  			if (UNEXPECTED((size_t)(key_length + parent_script_len + 1) >= sizeof(ZCG(key)))) {
  				return NULL;
  			}
  			ZCG(key)[key_length] = ':';
  			key_length += 1;
  			memcpy(ZCG(key) + key_length, ZSTR_VAL(parent_script), parent_script_len);
  			key_length += parent_script_len;
  		}
  		ZCG(key)[key_length] = '\0';
  		*key_len = ZCG(key_len) = key_length;
  		return ZCG(key);
  	}
  
  	/* not use_cwd */
  	*key_len = path_length;
  	return (char*)path;
  }
  
  int zend_accel_invalidate(const char *filename, int filename_len, zend_bool force)
  {
  	zend_string *realpath;
  	zend_persistent_script *persistent_script;
  
  	if (!ZCG(enabled) || !accel_startup_ok || !ZCSG(accelerator_enabled) || accelerator_shm_read_lock() != SUCCESS) {
  		return FAILURE;
  	}
  
  	realpath = accelerator_orig_zend_resolve_path(filename, filename_len);
  
  	if (!realpath) {
  		return FAILURE;
  	}
  
  #ifdef HAVE_OPCACHE_FILE_CACHE
  	if (ZCG(accel_directives).file_cache) {
  		zend_file_cache_invalidate(realpath);
  	}
  #endif
  
  	persistent_script = zend_accel_hash_find(&ZCSG(hash), realpath);
  	if (persistent_script && !persistent_script->corrupted) {
  		zend_file_handle file_handle;
  
  		file_handle.type = ZEND_HANDLE_FILENAME;
  		file_handle.filename = ZSTR_VAL(realpath);
  		file_handle.opened_path = realpath;
  
  		if (force ||
  			!ZCG(accel_directives).validate_timestamps ||
  			do_validate_timestamps(persistent_script, &file_handle) == FAILURE) {
  			SHM_UNPROTECT();
  			zend_shared_alloc_lock();
  			if (!persistent_script->corrupted) {
  				persistent_script->corrupted = 1;
  				persistent_script->timestamp = 0;
  				ZSMMG(wasted_shared_memory) += persistent_script->dynamic_members.memory_consumption;
  				if (ZSMMG(memory_exhausted)) {
  					zend_accel_restart_reason reason =
  						zend_accel_hash_is_full(&ZCSG(hash)) ? ACCEL_RESTART_HASH : ACCEL_RESTART_OOM;
  					zend_accel_schedule_restart_if_necessary(reason);
  				}
  			}
  			zend_shared_alloc_unlock();
  			SHM_PROTECT();
  		}
  	}
  
  	accelerator_shm_read_unlock();
  	zend_string_release(realpath);
  
  	return SUCCESS;
  }
  
  /* Adds another key for existing cached script */
  static void zend_accel_add_key(char *key, unsigned int key_length, zend_accel_hash_entry *bucket)
  {
  	if (!zend_accel_hash_str_find(&ZCSG(hash), key, key_length)) {
  		if (zend_accel_hash_is_full(&ZCSG(hash))) {
  			zend_accel_error(ACCEL_LOG_DEBUG, "No more entries in hash table!");
  			ZSMMG(memory_exhausted) = 1;
  			zend_accel_schedule_restart_if_necessary(ACCEL_RESTART_HASH);
  		} else {
  			char *new_key = zend_shared_alloc(key_length + 1);
  			if (new_key) {
  				memcpy(new_key, key, key_length + 1);
  				if (zend_accel_hash_update(&ZCSG(hash), new_key, key_length, 1, bucket)) {
  					zend_accel_error(ACCEL_LOG_INFO, "Added key '%s'", new_key);
  				}
  			} else {
  				zend_accel_schedule_restart_if_necessary(ACCEL_RESTART_OOM);
  			}
  		}
  	}
  }
  
  #ifdef HAVE_OPCACHE_FILE_CACHE
  static zend_persistent_script *cache_script_in_file_cache(zend_persistent_script *new_persistent_script, int *from_shared_memory)
  {
  	uint memory_used;
  
  	/* Check if script may be stored in shared memory */
  	if (!zend_accel_script_persistable(new_persistent_script)) {
  		return new_persistent_script;
  	}
  
  	if (!zend_accel_script_optimize(new_persistent_script)) {
  		return new_persistent_script;
  	}
  
  	zend_shared_alloc_init_xlat_table();
  
  	/* Calculate the required memory size */
  	memory_used = zend_accel_script_persist_calc(new_persistent_script, NULL, 0);
  
  	/* Allocate memory block */
  #ifdef __SSE2__
  	/* Align to 64-byte boundary */
  	ZCG(mem) = zend_arena_alloc(&CG(arena), memory_used + 64);
  	ZCG(mem) = (void*)(((zend_uintptr_t)ZCG(mem) + 63L) & ~63L);
  #else
  	ZCG(mem) = zend_arena_alloc(&CG(arena), memory_used);
  #endif
  
  	/* Copy into shared memory */
  	new_persistent_script = zend_accel_script_persist(new_persistent_script, NULL, 0);
  
  	zend_shared_alloc_destroy_xlat_table();
  
  	new_persistent_script->is_phar =
  		new_persistent_script->full_path &&
  		strstr(ZSTR_VAL(new_persistent_script->full_path), ".phar") &&
  		!strstr(ZSTR_VAL(new_persistent_script->full_path), "://");
  
  	/* Consistency check */
  	if ((char*)new_persistent_script->mem + new_persistent_script->size != (char*)ZCG(mem)) {
  		zend_accel_error(
  			((char*)new_persistent_script->mem + new_persistent_script->size < (char*)ZCG(mem)) ? ACCEL_LOG_ERROR : ACCEL_LOG_WARNING,
  			"Internal error: wrong size calculation: %s start=0x%08x, end=0x%08x, real=0x%08x\n",
  			ZSTR_VAL(new_persistent_script->full_path),
  			new_persistent_script->mem,
  			(char *)new_persistent_script->mem + new_persistent_script->size,
  			ZCG(mem));
  	}
  
  	new_persistent_script->dynamic_members.checksum = zend_accel_script_checksum(new_persistent_script);
  
  	zend_file_cache_script_store(new_persistent_script, 0);
  
  	*from_shared_memory = 1;
  	return new_persistent_script;
  }
  #endif
  
  static zend_persistent_script *cache_script_in_shared_memory(zend_persistent_script *new_persistent_script, char *key, unsigned int key_length, int *from_shared_memory)
  {
  	zend_accel_hash_entry *bucket;
  	uint memory_used;
  
  	/* Check if script may be stored in shared memory */
  	if (!zend_accel_script_persistable(new_persistent_script)) {
  		return new_persistent_script;
  	}
  
  	if (!zend_accel_script_optimize(new_persistent_script)) {
  		return new_persistent_script;
  	}
  
  	/* exclusive lock */
  	zend_shared_alloc_lock();
  
  	if (zend_accel_hash_is_full(&ZCSG(hash))) {
  		zend_accel_error(ACCEL_LOG_DEBUG, "No more entries in hash table!");
  		ZSMMG(memory_exhausted) = 1;
  		zend_accel_schedule_restart_if_necessary(ACCEL_RESTART_HASH);
  		zend_shared_alloc_unlock();
  		return new_persistent_script;
  	}
  
  	/* Check if we still need to put the file into the cache (may be it was
  	 * already stored by another process. This final check is done under
  	 * exclusive lock) */
  	bucket = zend_accel_hash_find_entry(&ZCSG(hash), new_persistent_script->full_path);
  	if (bucket) {
  		zend_persistent_script *existing_persistent_script = (zend_persistent_script *)bucket->data;
  
  		if (!existing_persistent_script->corrupted) {
  			if (key &&
  			    (!ZCG(accel_directives).validate_timestamps ||
  			     (new_persistent_script->timestamp == existing_persistent_script->timestamp))) {
  				zend_accel_add_key(key, key_length, bucket);
  			}
  			zend_shared_alloc_unlock();
  			return new_persistent_script;
  		}
  	}
  
  
  	zend_shared_alloc_init_xlat_table();
  
  	/* Calculate the required memory size */
  	memory_used = zend_accel_script_persist_calc(new_persistent_script, key, key_length);
  
  	/* Allocate shared memory */
  #ifdef __SSE2__
  	/* Align to 64-byte boundary */
  	ZCG(mem) = zend_shared_alloc(memory_used + 64);
  	ZCG(mem) = (void*)(((zend_uintptr_t)ZCG(mem) + 63L) & ~63L);
  #else
  	ZCG(mem) = zend_shared_alloc(memory_used);
  #endif
  	if (!ZCG(mem)) {
  		zend_shared_alloc_destroy_xlat_table();
  		zend_accel_schedule_restart_if_necessary(ACCEL_RESTART_OOM);
  		zend_shared_alloc_unlock();
  		return new_persistent_script;
  	}
  
  	/* Copy into shared memory */
  	new_persistent_script = zend_accel_script_persist(new_persistent_script, &key, key_length);
  
  	zend_shared_alloc_destroy_xlat_table();
  
  	new_persistent_script->is_phar =
  		new_persistent_script->full_path &&
  		strstr(ZSTR_VAL(new_persistent_script->full_path), ".phar") &&
  		!strstr(ZSTR_VAL(new_persistent_script->full_path), "://");
  
  	/* Consistency check */
  	if ((char*)new_persistent_script->mem + new_persistent_script->size != (char*)ZCG(mem)) {
  		zend_accel_error(
  			((char*)new_persistent_script->mem + new_persistent_script->size < (char*)ZCG(mem)) ? ACCEL_LOG_ERROR : ACCEL_LOG_WARNING,
  			"Internal error: wrong size calculation: %s start=0x%08x, end=0x%08x, real=0x%08x\n",
  			ZSTR_VAL(new_persistent_script->full_path),
  			new_persistent_script->mem,
  			(char *)new_persistent_script->mem + new_persistent_script->size,
  			ZCG(mem));
  	}
  
  	new_persistent_script->dynamic_members.checksum = zend_accel_script_checksum(new_persistent_script);
  
  	/* store script structure in the hash table */
  	bucket = zend_accel_hash_update(&ZCSG(hash), ZSTR_VAL(new_persistent_script->full_path), ZSTR_LEN(new_persistent_script->full_path), 0, new_persistent_script);
  	if (bucket) {
  		zend_accel_error(ACCEL_LOG_INFO, "Cached script '%s'", new_persistent_script->full_path);
  		if (key &&
  		    /* key may contain non-persistent PHAR aliases (see issues #115 and #149) */
  		    memcmp(key, "phar://", sizeof("phar://") - 1) != 0 &&
  		    (ZSTR_LEN(new_persistent_script->full_path) != key_length ||
  		     memcmp(ZSTR_VAL(new_persistent_script->full_path), key, key_length) != 0)) {
  			/* link key to the same persistent script in hash table */
  			if (zend_accel_hash_update(&ZCSG(hash), key, key_length, 1, bucket)) {
  				zend_accel_error(ACCEL_LOG_INFO, "Added key '%s'", key);
  			} else {
  				zend_accel_error(ACCEL_LOG_DEBUG, "No more entries in hash table!");
  				ZSMMG(memory_exhausted) = 1;
  				zend_accel_schedule_restart_if_necessary(ACCEL_RESTART_HASH);
  			}
  		}
  	}
  
  	new_persistent_script->dynamic_members.memory_consumption = ZEND_ALIGNED_SIZE(new_persistent_script->size);
  
  	zend_shared_alloc_unlock();
  
  #ifdef HAVE_OPCACHE_FILE_CACHE
  	if (ZCG(accel_directives).file_cache) {
  		SHM_PROTECT();
  		zend_file_cache_script_store(new_persistent_script, 1);
  		SHM_UNPROTECT();
  	}
  #endif
  
  	*from_shared_memory = 1;
  	return new_persistent_script;
  }
  
  static const struct jit_auto_global_info
  {
      const char *name;
      size_t len;
  } jit_auto_globals_info[] = {
      { "_SERVER",  sizeof("_SERVER")-1},
      { "_ENV",     sizeof("_ENV")-1},
      { "_REQUEST", sizeof("_REQUEST")-1},
      { "GLOBALS",  sizeof("GLOBALS")-1},
  };
  
  static zend_string *jit_auto_globals_str[4];
  
  static int zend_accel_get_auto_globals(void)
  {
  	int i, ag_size = (sizeof(jit_auto_globals_info) / sizeof(jit_auto_globals_info[0]));
  	int n = 1;
  	int mask = 0;
  
  	for (i = 0; i < ag_size ; i++) {
  		if (zend_hash_exists(&EG(symbol_table), jit_auto_globals_str[i])) {
  			mask |= n;
  		}
  		n += n;
  	}
  	return mask;
  }
  
  static int zend_accel_get_auto_globals_no_jit(void)
  {
  	if (zend_hash_exists(&EG(symbol_table), jit_auto_globals_str[3])) {
  		return 8;
  	}
  	return 0;
  }
  
  static void zend_accel_set_auto_globals(int mask)
  {
  	int i, ag_size = (sizeof(jit_auto_globals_info) / sizeof(jit_auto_globals_info[0]));
  	int n = 1;
  
  	for (i = 0; i < ag_size ; i++) {
  		if ((mask & n) && !(ZCG(auto_globals_mask) & n)) {
  			ZCG(auto_globals_mask) |= n;
  			zend_is_auto_global(jit_auto_globals_str[i]);
  		}
  		n += n;
  	}
  }
  
  static void zend_accel_init_auto_globals(void)
  {
  	int i, ag_size = (sizeof(jit_auto_globals_info) / sizeof(jit_auto_globals_info[0]));
  
  	for (i = 0; i < ag_size ; i++) {
  		jit_auto_globals_str[i] = zend_string_init(jit_auto_globals_info[i].name, jit_auto_globals_info[i].len, 1);
  		zend_string_hash_val(jit_auto_globals_str[i]);
  		jit_auto_globals_str[i] = accel_new_interned_string(jit_auto_globals_str[i]);
  	}
  }
  
  static zend_persistent_script *opcache_compile_file(zend_file_handle *file_handle, int type, char *key, unsigned int key_length, zend_op_array **op_array_p)
  {
  	zend_persistent_script *new_persistent_script;
  	zend_op_array *orig_active_op_array;
  	HashTable *orig_function_table, *orig_class_table;
  	zval orig_user_error_handler;
  	zend_op_array *op_array;
  	int do_bailout = 0;
  	accel_time_t timestamp = 0;
  	uint32_t orig_compiler_options = 0;
  
      /* Try to open file */
      if (file_handle->type == ZEND_HANDLE_FILENAME) {
          if (accelerator_orig_zend_stream_open_function(file_handle->filename, file_handle) == SUCCESS) {
          	/* key may be changed by zend_stream_open_function() */
          	if (key == ZCG(key)) {
          		key_length = ZCG(key_len);
          	}
          } else {
  			*op_array_p = NULL;
  			if (type == ZEND_REQUIRE) {
  				zend_message_dispatcher(ZMSG_FAILED_REQUIRE_FOPEN, file_handle->filename);
  				zend_bailout();
  			} else {
  				zend_message_dispatcher(ZMSG_FAILED_INCLUDE_FOPEN, file_handle->filename);
  			}
  			return NULL;
      	}
      }
  
  	/* check blacklist right after ensuring that file was opened */
  	if (file_handle->opened_path && zend_accel_blacklist_is_blacklisted(&accel_blacklist, ZSTR_VAL(file_handle->opened_path))) {
  		ZCSG(blacklist_misses)++;
  		*op_array_p = accelerator_orig_compile_file(file_handle, type);
  		return NULL;
  	}
  
  	if (ZCG(accel_directives).validate_timestamps ||
  	    ZCG(accel_directives).file_update_protection ||
  	    ZCG(accel_directives).max_file_size > 0) {
  		size_t size = 0;
  
  		/* Obtain the file timestamps, *before* actually compiling them,
  		 * otherwise we have a race-condition.
  		 */
  		timestamp = zend_get_file_handle_timestamp(file_handle, ZCG(accel_directives).max_file_size > 0 ? &size : NULL);
  
  		/* If we can't obtain a timestamp (that means file is possibly socket)
  		 *  we won't cache it
  		 */
  		if (timestamp == 0) {
  			*op_array_p = accelerator_orig_compile_file(file_handle, type);
  			return NULL;
  		}
  
  		/* check if file is too new (may be it's not written completely yet) */
  		if (ZCG(accel_directives).file_update_protection &&
  		    (ZCG(request_time) - ZCG(accel_directives).file_update_protection < timestamp)) {
  			*op_array_p = accelerator_orig_compile_file(file_handle, type);
  			return NULL;
  		}
  
  		if (ZCG(accel_directives).max_file_size > 0 && size > (size_t)ZCG(accel_directives).max_file_size) {
  			ZCSG(blacklist_misses)++;
  			*op_array_p = accelerator_orig_compile_file(file_handle, type);
  			return NULL;
  		}
  	}
  
  	new_persistent_script = create_persistent_script();
  
  	/* Save the original values for the op_array, function table and class table */
  	orig_active_op_array = CG(active_op_array);
  	orig_function_table = CG(function_table);
  	orig_class_table = CG(class_table);
  	ZVAL_COPY_VALUE(&orig_user_error_handler, &EG(user_error_handler));
  
  	/* Override them with ours */
  	CG(function_table) = &ZCG(function_table);
  	EG(class_table) = CG(class_table) = &new_persistent_script->class_table;
  	ZVAL_UNDEF(&EG(user_error_handler));
  
  	zend_try {
  		orig_compiler_options = CG(compiler_options);
  		CG(compiler_options) |= ZEND_COMPILE_HANDLE_OP_ARRAY;
  		CG(compiler_options) |= ZEND_COMPILE_IGNORE_INTERNAL_CLASSES;
  		CG(compiler_options) |= ZEND_COMPILE_DELAYED_BINDING;
  		CG(compiler_options) |= ZEND_COMPILE_NO_CONSTANT_SUBSTITUTION;
  		op_array = *op_array_p = accelerator_orig_compile_file(file_handle, type);
  		CG(compiler_options) = orig_compiler_options;
  	} zend_catch {
  		op_array = NULL;
  		do_bailout = 1;
  		CG(compiler_options) = orig_compiler_options;
  	} zend_end_try();
  
  	/* Restore originals */
  	CG(active_op_array) = orig_active_op_array;
  	CG(function_table) = orig_function_table;
  	EG(class_table) = CG(class_table) = orig_class_table;
  	EG(user_error_handler) = orig_user_error_handler;
  
  	if (!op_array) {
  		/* compilation failed */
  		free_persistent_script(new_persistent_script, 1);
  		zend_accel_free_user_functions(&ZCG(function_table));
  		if (do_bailout) {
  			zend_bailout();
  		}
  		return NULL;
  	}
  
  	/* Build the persistent_script structure.
  	   Here we aren't sure we would store it, but we will need it
  	   further anyway.
  	*/
  	zend_accel_move_user_functions(&ZCG(function_table), &new_persistent_script->function_table);
  	new_persistent_script->main_op_array = *op_array;
  
  	efree(op_array); /* we have valid persistent_script, so it's safe to free op_array */
  
      /* Fill in the ping_auto_globals_mask for the new script. If jit for auto globals is enabled we
         will have to ping the used auto global variables before execution */
  	if (PG(auto_globals_jit)) {
  		new_persistent_script->ping_auto_globals_mask = zend_accel_get_auto_globals();
  	} else {
  		new_persistent_script->ping_auto_globals_mask = zend_accel_get_auto_globals_no_jit();
  	}
  
  	if (ZCG(accel_directives).validate_timestamps) {
  		/* Obtain the file timestamps, *before* actually compiling them,
  		 * otherwise we have a race-condition.
  		 */
  		new_persistent_script->timestamp = timestamp;
  		new_persistent_script->dynamic_members.revalidate = ZCG(request_time) + ZCG(accel_directives).revalidate_freq;
  	}
  
  	if (file_handle->opened_path) {
  		new_persistent_script->full_path = zend_string_copy(file_handle->opened_path);
  	} else {
  		new_persistent_script->full_path = zend_string_init(file_handle->filename, strlen(file_handle->filename), 0);
  	}
  	zend_string_hash_val(new_persistent_script->full_path);
  
  	/* Now persistent_script structure is ready in process memory */
  	return new_persistent_script;
  }
  
  #ifdef HAVE_OPCACHE_FILE_CACHE
  zend_op_array *file_cache_compile_file(zend_file_handle *file_handle, int type)
  {
  	zend_persistent_script *persistent_script;
  	zend_op_array *op_array = NULL;
  	int from_memory; /* if the script we've got is stored in SHM */
  
  	if (is_stream_path(file_handle->filename) &&
  	    !is_cacheable_stream_path(file_handle->filename)) {
  		return accelerator_orig_compile_file(file_handle, type);
  	}
  
  	if (!file_handle->opened_path) {
  		if (file_handle->type == ZEND_HANDLE_FILENAME &&
  		    accelerator_orig_zend_stream_open_function(file_handle->filename, file_handle) == FAILURE) {
  			if (type == ZEND_REQUIRE) {
  				zend_message_dispatcher(ZMSG_FAILED_REQUIRE_FOPEN, file_handle->filename);
  				zend_bailout();
  			} else {
  				zend_message_dispatcher(ZMSG_FAILED_INCLUDE_FOPEN, file_handle->filename);
  			}
  			return NULL;
  	    }
  	}
  
  	persistent_script = zend_file_cache_script_load(file_handle);
  	if (persistent_script) {
  		/* see bug #15471 (old BTS) */
  		if (persistent_script->full_path) {
  			if (!EG(current_execute_data) || !EG(current_execute_data)->opline ||
  			    !EG(current_execute_data)->func ||
  			    !ZEND_USER_CODE(EG(current_execute_data)->func->common.type) ||
  			    EG(current_execute_data)->opline->opcode != ZEND_INCLUDE_OR_EVAL ||
  			    (EG(current_execute_data)->opline->extended_value != ZEND_INCLUDE_ONCE &&
  			     EG(current_execute_data)->opline->extended_value != ZEND_REQUIRE_ONCE)) {
  				if (zend_hash_add_empty_element(&EG(included_files), persistent_script->full_path) != NULL) {
  					/* ext/phar has to load phar's metadata into memory */
  					if (persistent_script->is_phar) {
  						php_stream_statbuf ssb;
  						char *fname = emalloc(sizeof("phar://") + ZSTR_LEN(persistent_script->full_path));
  
  						memcpy(fname, "phar://", sizeof("phar://") - 1);
  						memcpy(fname + sizeof("phar://") - 1, ZSTR_VAL(persistent_script->full_path), ZSTR_LEN(persistent_script->full_path) + 1);
  						php_stream_stat_path(fname, &ssb);
  						efree(fname);
  					}
  				}
  			}
  		}
  		zend_file_handle_dtor(file_handle);
  
  		persistent_script->dynamic_members.last_used = ZCG(request_time);
  
  	    if (persistent_script->ping_auto_globals_mask) {
  			zend_accel_set_auto_globals(persistent_script->ping_auto_globals_mask);
  		}
  
  		return zend_accel_load_script(persistent_script, 1);
  	}
  
  	persistent_script = opcache_compile_file(file_handle, type, NULL, 0, &op_array);
  
  	if (persistent_script) {
  		from_memory = 0;
  		persistent_script = cache_script_in_file_cache(persistent_script, &from_memory);
  		return zend_accel_load_script(persistent_script, from_memory);
  	}
  
  	return op_array;
  }
  #endif
  
  /* zend_compile() replacement */
  zend_op_array *persistent_compile_file(zend_file_handle *file_handle, int type)
  {
  	zend_persistent_script *persistent_script = NULL;
  	char *key = NULL;
  	int key_length;
  	int from_shared_memory; /* if the script we've got is stored in SHM */
  
  	if (!file_handle->filename || !ZCG(enabled) || !accel_startup_ok) {
  		/* The Accelerator is disabled, act as if without the Accelerator */
  		return accelerator_orig_compile_file(file_handle, type);
  #ifdef HAVE_OPCACHE_FILE_CACHE
  	} else if (ZCG(accel_directives).file_cache_only) {
  		return file_cache_compile_file(file_handle, type);
  #endif
  	} else if ((!ZCG(counted) && !ZCSG(accelerator_enabled)) ||
  	           (ZCSG(restart_in_progress) && accel_restart_is_active())) {
  #ifdef HAVE_OPCACHE_FILE_CACHE
  		if (ZCG(accel_directives).file_cache) {
  			return file_cache_compile_file(file_handle, type);
  		}
  #endif
  		return accelerator_orig_compile_file(file_handle, type);
  	}
  
  	/* In case this callback is called from include_once, require_once or it's
  	 * a main FastCGI request, the key must be already calculated, and cached
  	 * persistent script already found */
  	if (ZCG(cache_persistent_script) &&
  	    ((!EG(current_execute_data) &&
  	      file_handle->filename == SG(request_info).path_translated &&
  	      ZCG(cache_opline) == NULL) ||
  	     (EG(current_execute_data) &&
  	      EG(current_execute_data)->func &&
  	      ZEND_USER_CODE(EG(current_execute_data)->func->common.type) &&
  	      ZCG(cache_opline) == EG(current_execute_data)->opline))) {
  
  		persistent_script = ZCG(cache_persistent_script);
  		if (ZCG(key_len)) {
  			key = ZCG(key);
  			key_length = ZCG(key_len);
  		}
  
  	} else {
  		if (!ZCG(accel_directives).revalidate_path) {
  			/* try to find cached script by key */
  			key = accel_make_persistent_key(file_handle->filename, strlen(file_handle->filename), &key_length);
  			if (!key) {
  				return accelerator_orig_compile_file(file_handle, type);
  			}
  			persistent_script = zend_accel_hash_str_find(&ZCSG(hash), key, key_length);
  		}
  		if (!persistent_script) {
  			/* try to find cached script by full real path */
  			zend_accel_hash_entry *bucket;
  
  			/* open file to resolve the path */
  		    if (file_handle->type == ZEND_HANDLE_FILENAME &&
          		accelerator_orig_zend_stream_open_function(file_handle->filename, file_handle) == FAILURE) {
  				if (type == ZEND_REQUIRE) {
  					zend_message_dispatcher(ZMSG_FAILED_REQUIRE_FOPEN, file_handle->filename);
  					zend_bailout();
  				} else {
  					zend_message_dispatcher(ZMSG_FAILED_INCLUDE_FOPEN, file_handle->filename);
  				}
  				return NULL;
  		    }
  
  			if (file_handle->opened_path) {
  				bucket = zend_accel_hash_find_entry(&ZCSG(hash), file_handle->opened_path);
  
  				if (bucket) {
  					persistent_script = (zend_persistent_script *)bucket->data;
  
  					if (key && !persistent_script->corrupted) {
  						SHM_UNPROTECT();
  						zend_shared_alloc_lock();
  						zend_accel_add_key(key, key_length, bucket);
  						zend_shared_alloc_unlock();
  						SHM_PROTECT();
  					}
  				}
  			}
  		}
  	}
  
  	/* clear cache */
  	ZCG(cache_opline) = NULL;
  	ZCG(cache_persistent_script) = NULL;
  
  	if (persistent_script && persistent_script->corrupted) {
  		persistent_script = NULL;
  	}
  
  	/* Make sure we only increase the currently running processes semaphore
       * once each execution (this function can be called more than once on
       * each execution)
       */
  	if (!ZCG(counted)) {
  		ZCG(counted) = 1;
  		accel_activate_add();
  	}
  
  	SHM_UNPROTECT();
  
  	/* If script is found then validate_timestamps if option is enabled */
  	if (persistent_script && ZCG(accel_directives).validate_timestamps) {
  		if (validate_timestamp_and_record(persistent_script, file_handle) == FAILURE) {
  			zend_shared_alloc_lock();
  			if (!persistent_script->corrupted) {
  				persistent_script->corrupted = 1;
  				persistent_script->timestamp = 0;
  				ZSMMG(wasted_shared_memory) += persistent_script->dynamic_members.memory_consumption;
  				if (ZSMMG(memory_exhausted)) {
  					zend_accel_restart_reason reason =
  						zend_accel_hash_is_full(&ZCSG(hash)) ? ACCEL_RESTART_HASH : ACCEL_RESTART_OOM;
  					zend_accel_schedule_restart_if_necessary(reason);
  				}
  			}
  			zend_shared_alloc_unlock();
  			persistent_script = NULL;
  		}
  	}
  
  	/* if turned on - check the compiled script ADLER32 checksum */
  	if (persistent_script && ZCG(accel_directives).consistency_checks
  		&& persistent_script->dynamic_members.hits % ZCG(accel_directives).consistency_checks == 0) {
  
  		unsigned int checksum = zend_accel_script_checksum(persistent_script);
  		if (checksum != persistent_script->dynamic_members.checksum ) {
  			/* The checksum is wrong */
  			zend_accel_error(ACCEL_LOG_INFO, "Checksum failed for '%s':  expected=0x%0.8X, found=0x%0.8X",
  							 persistent_script->full_path, persistent_script->dynamic_members.checksum, checksum);
  			zend_shared_alloc_lock();
  			if (!persistent_script->corrupted) {
  				persistent_script->corrupted = 1;
  				persistent_script->timestamp = 0;
  				ZSMMG(wasted_shared_memory) += persistent_script->dynamic_members.memory_consumption;
  				if (ZSMMG(memory_exhausted)) {
  					zend_accel_restart_reason reason =
  						zend_accel_hash_is_full(&ZCSG(hash)) ? ACCEL_RESTART_HASH : ACCEL_RESTART_OOM;
  					zend_accel_schedule_restart_if_necessary(reason);
  				}
  			}
  			zend_shared_alloc_unlock();
  			persistent_script = NULL;
  		}
  	}
  
  #ifdef HAVE_OPCACHE_FILE_CACHE
  	/* Check the second level cache */
  	if (!persistent_script && ZCG(accel_directives).file_cache) {
  		persistent_script = zend_file_cache_script_load(file_handle);
  	}
  #endif
  
  	/* If script was not found or invalidated by validate_timestamps */
  	if (!persistent_script) {
  		uint32_t old_const_num = zend_hash_next_free_element(EG(zend_constants));
  		zend_op_array *op_array;
  
  		/* Cache miss.. */
  		ZCSG(misses)++;
  
  		/* No memory left. Behave like without the Accelerator */
  		if (ZSMMG(memory_exhausted) || ZCSG(restart_pending)) {
  			SHM_PROTECT();
  			return accelerator_orig_compile_file(file_handle, type);
  		}
  
  		/* Try and cache the script and assume that it is returned from_shared_memory.
           * If it isn't compile_and_cache_file() changes the flag to 0
           */
         	from_shared_memory = 0;
  		persistent_script = opcache_compile_file(file_handle, type, key, key ? key_length : 0, &op_array);
  		if (persistent_script) {
  			persistent_script = cache_script_in_shared_memory(persistent_script, key, key ? key_length : 0, &from_shared_memory);
  		}
  
  		/* Caching is disabled, returning op_array;
  		 * or something went wrong during compilation, returning NULL
  		 */
  		if (!persistent_script) {
  			SHM_PROTECT();
  			return op_array;
  		}
  		if (from_shared_memory) {
  			/* Delete immutable arrays moved into SHM */
  			uint32_t new_const_num = zend_hash_next_free_element(EG(zend_constants));
  			while (new_const_num > old_const_num) {
  				new_const_num--;
  				zend_hash_index_del(EG(zend_constants), new_const_num);
  			}
  		}
  	} else {
  
  #if !ZEND_WIN32
  		ZCSG(hits)++; /* TBFixed: may lose one hit */
  		persistent_script->dynamic_members.hits++; /* see above */
  #else
  #ifdef _M_X64
  		InterlockedIncrement64(&ZCSG(hits));
  #else
  		InterlockedIncrement(&ZCSG(hits));
  #endif
  		InterlockedIncrement64(&persistent_script->dynamic_members.hits);
  #endif
  
  		/* see bug #15471 (old BTS) */
  		if (persistent_script->full_path) {
  			if (!EG(current_execute_data) || !EG(current_execute_data)->opline ||
  			    !EG(current_execute_data)->func ||
  			    !ZEND_USER_CODE(EG(current_execute_data)->func->common.type) ||
  			    EG(current_execute_data)->opline->opcode != ZEND_INCLUDE_OR_EVAL ||
  			    (EG(current_execute_data)->opline->extended_value != ZEND_INCLUDE_ONCE &&
  			     EG(current_execute_data)->opline->extended_value != ZEND_REQUIRE_ONCE)) {
  				if (zend_hash_add_empty_element(&EG(included_files), persistent_script->full_path) != NULL) {
  					/* ext/phar has to load phar's metadata into memory */
  					if (persistent_script->is_phar) {
  						php_stream_statbuf ssb;
  						char *fname = emalloc(sizeof("phar://") + ZSTR_LEN(persistent_script->full_path));
  
  						memcpy(fname, "phar://", sizeof("phar://") - 1);
  						memcpy(fname + sizeof("phar://") - 1, ZSTR_VAL(persistent_script->full_path), ZSTR_LEN(persistent_script->full_path) + 1);
  						php_stream_stat_path(fname, &ssb);
  						efree(fname);
  					}
  				}
  			}
  		}
  		zend_file_handle_dtor(file_handle);
  		from_shared_memory = 1;
  	}
  
  	persistent_script->dynamic_members.last_used = ZCG(request_time);
  
  	SHM_PROTECT();
  
      /* Fetch jit auto globals used in the script before execution */
      if (persistent_script->ping_auto_globals_mask) {
  		zend_accel_set_auto_globals(persistent_script->ping_auto_globals_mask);
  	}
  
  	return zend_accel_load_script(persistent_script, from_shared_memory);
  }
  
  /* zend_stream_open_function() replacement for PHP 5.3 and above */
  static int persistent_stream_open_function(const char *filename, zend_file_handle *handle)
  {
  	if (ZCG(cache_persistent_script)) {
  		/* check if callback is called from include_once or it's a main request */
  		if ((!EG(current_execute_data) &&
  		     filename == SG(request_info).path_translated &&
  		     ZCG(cache_opline) == NULL) ||
  		    (EG(current_execute_data) &&
  		     EG(current_execute_data)->func &&
  		     ZEND_USER_CODE(EG(current_execute_data)->func->common.type) &&
  		     ZCG(cache_opline) == EG(current_execute_data)->opline)) {
  
  			/* we are in include_once or FastCGI request */
  			handle->filename = (char*)filename;
  			handle->free_filename = 0;
  			handle->opened_path = zend_string_copy(ZCG(cache_persistent_script)->full_path);
  			handle->type = ZEND_HANDLE_FILENAME;
  			return SUCCESS;
  		}
  		ZCG(cache_opline) = NULL;
  		ZCG(cache_persistent_script) = NULL;
  	}
  	return accelerator_orig_zend_stream_open_function(filename, handle);
  }
  
  /* zend_resolve_path() replacement for PHP 5.3 and above */
  static zend_string* persistent_zend_resolve_path(const char *filename, int filename_len)
  {
  	if (ZCG(enabled) && accel_startup_ok &&
  	    (ZCG(counted) || ZCSG(accelerator_enabled)) &&
  	    !ZCSG(restart_in_progress)) {
  
  		/* check if callback is called from include_once or it's a main request */
  		if ((!EG(current_execute_data) &&
  		     filename == SG(request_info).path_translated) ||
  		    (EG(current_execute_data) &&
  		     EG(current_execute_data)->func &&
  		     ZEND_USER_CODE(EG(current_execute_data)->func->common.type) &&
  		     EG(current_execute_data)->opline->opcode == ZEND_INCLUDE_OR_EVAL &&
  		     (EG(current_execute_data)->opline->extended_value == ZEND_INCLUDE_ONCE ||
  		      EG(current_execute_data)->opline->extended_value == ZEND_REQUIRE_ONCE))) {
  
  			/* we are in include_once or FastCGI request */
  			zend_string *resolved_path;
  			int key_length;
  			char *key = NULL;
  			
  			if (!ZCG(accel_directives).revalidate_path) {
  				/* lookup by "not-real" path */
  				key = accel_make_persistent_key(filename, filename_len, &key_length);
  				if (key) {
  					zend_accel_hash_entry *bucket = zend_accel_hash_str_find_entry(&ZCSG(hash), key, key_length);
  					if (bucket != NULL) {
  						zend_persistent_script *persistent_script = (zend_persistent_script *)bucket->data;
  						if (!persistent_script->corrupted) {
  							ZCG(cache_opline) = EG(current_execute_data) ? EG(current_execute_data)->opline : NULL;
  							ZCG(cache_persistent_script) = persistent_script;
  							return zend_string_copy(persistent_script->full_path);
  						}
  					}
  				} else {
  					ZCG(cache_opline) = NULL;
  					ZCG(cache_persistent_script) = NULL;
  					return accelerator_orig_zend_resolve_path(filename, filename_len);
  				}
  			}
  
  			/* find the full real path */
  			resolved_path = accelerator_orig_zend_resolve_path(filename, filename_len);
  
  			if (resolved_path) {
  				/* lookup by real path */
  				zend_accel_hash_entry *bucket = zend_accel_hash_find_entry(&ZCSG(hash), resolved_path);
  				if (bucket) {
  					zend_persistent_script *persistent_script = (zend_persistent_script *)bucket->data;
  					if (!persistent_script->corrupted) {
  						if (key) {
  							/* add another "key" for the same bucket */
  							SHM_UNPROTECT();
  							zend_shared_alloc_lock();
  							zend_accel_add_key(key, key_length, bucket);
  							zend_shared_alloc_unlock();
  							SHM_PROTECT();
  						} else {
  							ZCG(key_len) = 0;
  						}
  						ZCG(cache_opline) = EG(current_execute_data) ? EG(current_execute_data)->opline : NULL;
  						ZCG(cache_persistent_script) = persistent_script;
  						return resolved_path;
  					}
  				}
  			}
  
  			ZCG(cache_opline) = NULL;
  			ZCG(cache_persistent_script) = NULL;
  			return resolved_path;
  		}
  	}
  	ZCG(cache_opline) = NULL;
  	ZCG(cache_persistent_script) = NULL;
  	return accelerator_orig_zend_resolve_path(filename, filename_len);
  }
  
  static void zend_reset_cache_vars(void)
  {
  	ZSMMG(memory_exhausted) = 0;
  	ZCSG(hits) = 0;
  	ZCSG(misses) = 0;
  	ZCSG(blacklist_misses) = 0;
  	ZSMMG(wasted_shared_memory) = 0;
  	ZCSG(restart_pending) = 0;
  	ZCSG(force_restart_time) = 0;
  }
  
  static void accel_reset_pcre_cache(void)
  {
  	Bucket *p;
  
  	ZEND_HASH_FOREACH_BUCKET(&PCRE_G(pcre_cache), p) {
  		/* Remove PCRE cache entries with inconsistent keys */
  		if (ZSTR_IS_INTERNED(p->key)) {
  			p->key = NULL;
  			zend_hash_del_bucket(&PCRE_G(pcre_cache), p);
  		}
  	} ZEND_HASH_FOREACH_END();
  }
  
  static void accel_activate(void)
  {
  	zend_bool reset_pcre = 0;
  
  	if (!ZCG(enabled) || !accel_startup_ok) {
  		return;
  	}
  
  	if (!ZCG(function_table).nTableSize) {
  		zend_hash_init(&ZCG(function_table), zend_hash_num_elements(CG(function_table)), NULL, ZEND_FUNCTION_DTOR, 1);
  		zend_accel_copy_internal_functions();
  	}
  
  	/* PHP-5.4 and above return "double", but we use 1 sec precision */
  	ZCG(auto_globals_mask) = 0;
  	ZCG(request_time) = (time_t)sapi_get_request_time();
  	ZCG(cache_opline) = NULL;
  	ZCG(cache_persistent_script) = NULL;
  	ZCG(include_path_key_len) = 0;
  	ZCG(include_path_check) = 1;
  
  	/* check if ZCG(function_table) wasn't somehow polluted on the way */
  	if (ZCG(internal_functions_count) != zend_hash_num_elements(&ZCG(function_table))) {
  		zend_accel_error(ACCEL_LOG_WARNING, "Internal functions count changed - was %d, now %d", ZCG(internal_functions_count), zend_hash_num_elements(&ZCG(function_table)));
  	}
  
  	ZCG(cwd) = NULL;
  	ZCG(cwd_key_len) = 0;
  	ZCG(cwd_check) = 1;
  
  #ifdef HAVE_OPCACHE_FILE_CACHE
  	if (ZCG(accel_directives).file_cache_only) {
  		return;
  	}
  #endif
  
  	SHM_UNPROTECT();
  
  	if (ZCG(counted)) {
  #ifdef ZTS
  		zend_accel_error(ACCEL_LOG_WARNING, "Stuck count for thread id %d", tsrm_thread_id());
  #else
  		zend_accel_error(ACCEL_LOG_WARNING, "Stuck count for pid %d", getpid());
  #endif
  		accel_unlock_all();
  		ZCG(counted) = 0;
  	}
  
  	if (ZCSG(restart_pending)) {
  		zend_shared_alloc_lock();
  		if (ZCSG(restart_pending) != 0) { /* check again, to ensure that the cache wasn't already cleaned by another process */
  			if (accel_is_inactive() == SUCCESS) {
  				zend_accel_error(ACCEL_LOG_DEBUG, "Restarting!");
  				ZCSG(restart_pending) = 0;
  				switch ZCSG(restart_reason) {
  					case ACCEL_RESTART_OOM:
  						ZCSG(oom_restarts)++;
  						break;
  					case ACCEL_RESTART_HASH:
  						ZCSG(hash_restarts)++;
  						break;
  					case ACCEL_RESTART_USER:
  						ZCSG(manual_restarts)++;
  						break;
  				}
  				accel_restart_enter();
  
  				zend_reset_cache_vars();
  				zend_accel_hash_clean(&ZCSG(hash));
  
  #if !defined(ZTS)
  				if (ZCG(accel_directives).interned_strings_buffer) {
  					accel_interned_strings_restore_state();
  				}
  #endif
  
  				zend_shared_alloc_restore_state();
  				ZCSG(accelerator_enabled) = ZCSG(cache_status_before_restart);
  				if (ZCSG(last_restart_time) < ZCG(request_time)) {
  					ZCSG(last_restart_time) = ZCG(request_time);
  				} else {
  					ZCSG(last_restart_time)++;
  				}
  				accel_restart_leave();
  			}
  		} else {
  			reset_pcre = 1;
  		}
  		zend_shared_alloc_unlock();
  	}
  
  	SHM_PROTECT();
  
  	if (ZCSG(last_restart_time) != ZCG(last_restart_time)) {
  		/* SHM was reinitialized. */
  		ZCG(last_restart_time) = ZCSG(last_restart_time);
  
  		/* Reset in-process realpath cache */
  		realpath_cache_clean();
  
  		accel_reset_pcre_cache();
  	} else if (reset_pcre) {
  		accel_reset_pcre_cache();
  	}
  }
  
  #if !ZEND_DEBUG
  
  /* Fast Request Shutdown
   * =====================
   * Zend Memory Manager frees memory by its own. We don't have to free each
   * allocated block separately, but we like to call all the destructors and
   * callbacks in exactly the same order.
   */
  static void accel_fast_hash_destroy(HashTable *ht);
  
  static void accel_fast_zval_dtor(zval *zvalue)
  {
  tail_call:
  	switch (Z_TYPE_P(zvalue)) {
  		case IS_ARRAY:
  			GC_REMOVE_FROM_BUFFER(Z_ARR_P(zvalue));
  			if (Z_ARR_P(zvalue) != &EG(symbol_table)) {
  				/* break possible cycles */
  				ZVAL_NULL(zvalue);
  				accel_fast_hash_destroy(Z_ARRVAL_P(zvalue));
  			}
  			break;
  		case IS_OBJECT:
  			OBJ_RELEASE(Z_OBJ_P(zvalue));
  			break;
  		case IS_RESOURCE:
  			zend_list_delete(Z_RES_P(zvalue));
  			break;
  		case IS_REFERENCE: {
  				zend_reference *ref = Z_REF_P(zvalue);
  
  				if (--GC_REFCOUNT(ref) == 0) {
  					if (Z_REFCOUNTED(ref->val) && Z_DELREF(ref->val) == 0) {
  						zvalue = &ref->val;
  						goto tail_call;
  					}
  				}
  			}
  			break;
  	}
  }
  
  static void accel_fast_hash_destroy(HashTable *ht)
  {
  	Bucket *p = ht->arData;
  	Bucket *end = p + ht->nNumUsed;
  
  	while (p != end) {
  		if (Z_REFCOUNTED(p->val) && Z_DELREF(p->val) == 0) {
  			accel_fast_zval_dtor(&p->val);
  		}
  		p++;
  	}
  }
  
  static inline void zend_accel_fast_del_bucket(HashTable *ht, uint32_t idx, Bucket *p)
  {
  	uint32_t nIndex = p->h | ht->nTableMask;
  	uint32_t i = HT_HASH(ht, nIndex);
  
  	ht->nNumOfElements--;
  	if (idx != i) {
  		Bucket *prev = HT_HASH_TO_BUCKET(ht, i);
  		while (Z_NEXT(prev->val) != idx) {
  			i = Z_NEXT(prev->val);
  			prev = HT_HASH_TO_BUCKET(ht, i);
  		}
  		Z_NEXT(prev->val) = Z_NEXT(p->val);
   	} else {
  		HT_HASH(ht, p->h | ht->nTableMask) = Z_NEXT(p->val);
  	}
  }
  
  static void zend_accel_fast_shutdown(void)
  {
  	if (EG(full_tables_cleanup)) {
  		return;
  	}
  
  	if (EG(objects_store).top > 1 || zend_hash_num_elements(&EG(regular_list)) > 0) {
  		/* We don't have to destroy all zvals if they cannot call any destructors */
  		zend_try {
  			ZEND_HASH_REVERSE_FOREACH(&EG(symbol_table), 0) {
  				if (Z_REFCOUNTED(_p->val) && Z_DELREF(_p->val) == 0) {
  					accel_fast_zval_dtor(&_p->val);
  				}
  				zend_accel_fast_del_bucket(&EG(symbol_table), HT_IDX_TO_HASH(_idx-1), _p);
  			} ZEND_HASH_FOREACH_END();
  		} zend_end_try();
  		zend_hash_init(&EG(symbol_table), 8, NULL, NULL, 0);
  
  		ZEND_HASH_REVERSE_FOREACH(EG(function_table), 0) {
  			zend_function *func = Z_PTR(_p->val);
  
  			if (func->type == ZEND_INTERNAL_FUNCTION) {
  				break;
  			} else {
  				if (func->op_array.static_variables) {
  					if (!(GC_FLAGS(func->op_array.static_variables) & IS_ARRAY_IMMUTABLE)) {
  						if (--GC_REFCOUNT(func->op_array.static_variables) == 0) {
  							accel_fast_hash_destroy(func->op_array.static_variables);
  						}
  					}
  				}
  				zend_accel_fast_del_bucket(EG(function_table), HT_IDX_TO_HASH(_idx-1), _p);
  			}
  		} ZEND_HASH_FOREACH_END();
  
  		ZEND_HASH_REVERSE_FOREACH(EG(class_table), 0) {
  			zend_class_entry *ce = Z_PTR(_p->val);
  
  			if (ce->type == ZEND_INTERNAL_CLASS) {
  				break;
  			} else {
  				if (ce->ce_flags & ZEND_HAS_STATIC_IN_METHODS) {
  					zend_function *func;
  
  					ZEND_HASH_FOREACH_PTR(&ce->function_table, func) {
  						if (func->type == ZEND_USER_FUNCTION) {
  							if (func->op_array.static_variables) {
  								if (!(GC_FLAGS(func->op_array.static_variables) & IS_ARRAY_IMMUTABLE)) {
  									if (--GC_REFCOUNT(func->op_array.static_variables) == 0) {
  										accel_fast_hash_destroy(func->op_array.static_variables);
  									}
  								}
  								func->op_array.static_variables = NULL;
  							}
  						}
  					} ZEND_HASH_FOREACH_END();
  				}
  				if (ce->static_members_table) {
  					int i;
  
  					for (i = 0; i < ce->default_static_members_count; i++) {
  						zval *zv = &ce->static_members_table[i];
  						ZVAL_UNDEF(&ce->static_members_table[i]);
  						if (Z_REFCOUNTED_P(zv) && Z_DELREF_P(zv) == 0) {
  							accel_fast_zval_dtor(zv);
  						}
  					}
  					ce->static_members_table = NULL;
  				}
  				zend_accel_fast_del_bucket(EG(class_table), HT_IDX_TO_HASH(_idx-1), _p);
  			}
  		} ZEND_HASH_FOREACH_END();
  
  	} else {
  
  		zend_hash_init(&EG(symbol_table), 8, NULL, NULL, 0);
  
  		ZEND_HASH_REVERSE_FOREACH(EG(function_table), 0) {
  			zend_function *func = Z_PTR(_p->val);
  
  			if (func->type == ZEND_INTERNAL_FUNCTION) {
  				break;
  			} else {
  				zend_accel_fast_del_bucket(EG(function_table), HT_IDX_TO_HASH(_idx-1), _p);
  			}
  		} ZEND_HASH_FOREACH_END();
  
  		ZEND_HASH_REVERSE_FOREACH(EG(class_table), 0) {
  			zend_class_entry *ce = Z_PTR(_p->val);
  
  			if (ce->type == ZEND_INTERNAL_CLASS) {
  				break;
  			} else {
  				zend_accel_fast_del_bucket(EG(class_table), HT_IDX_TO_HASH(_idx-1), _p);
  			}
  		} ZEND_HASH_FOREACH_END();
  	}
  
  	ZEND_HASH_REVERSE_FOREACH(EG(zend_constants), 0) {
  		zend_constant *c = Z_PTR(_p->val);
  
  		if (c->flags & CONST_PERSISTENT) {
  			break;
  		} else {
  			zend_accel_fast_del_bucket(EG(zend_constants), HT_IDX_TO_HASH(_idx-1), _p);
  		}
  	} ZEND_HASH_FOREACH_END();
  	EG(function_table)->nNumUsed = EG(function_table)->nNumOfElements;
  	EG(class_table)->nNumUsed = EG(class_table)->nNumOfElements;
  	EG(zend_constants)->nNumUsed = EG(zend_constants)->nNumOfElements;
  
  	CG(unclean_shutdown) = 1;
  }
  #endif
  
  static void accel_deactivate(void)
  {
  	/* ensure that we restore function_table and class_table
  	 * In general, they're restored by persistent_compile_file(), but in case
  	 * the script is aborted abnormally, they may become messed up.
  	 */
  
  	if (!ZCG(enabled) || !accel_startup_ok) {
  		return;
  	}
  
  	zend_shared_alloc_safe_unlock(); /* be sure we didn't leave cache locked */
  	accel_unlock_all();
  	ZCG(counted) = 0;
  
  #if !ZEND_DEBUG
  	if (ZCG(accel_directives).fast_shutdown && is_zend_mm()) {
  		zend_accel_fast_shutdown();
  	}
  #endif
  
  	if (ZCG(cwd)) {
  		zend_string_release(ZCG(cwd));
  		ZCG(cwd) = NULL;
  	}
  
  }
  
  static int accelerator_remove_cb(zend_extension *element1, zend_extension *element2)
  {
  	(void)element2; /* keep the compiler happy */
  
  	if (!strcmp(element1->name, ACCELERATOR_PRODUCT_NAME )) {
  		element1->startup = NULL;
  #if 0
  		/* We have to call shutdown callback it to free TS resources */
  		element1->shutdown = NULL;
  #endif
  		element1->activate = NULL;
  		element1->deactivate = NULL;
  		element1->op_array_handler = NULL;
  
  #ifdef __DEBUG_MESSAGES__
          fprintf(stderr, ACCELERATOR_PRODUCT_NAME " is disabled: %s\n", (zps_failure_reason ? zps_failure_reason : "unknown error"));
          fflush(stderr);
  #endif
  	}
  
  	return 0;
  }
  
  static void zps_startup_failure(char *reason, char *api_reason, int (*cb)(zend_extension *, zend_extension *))
  {
  	accel_startup_ok = 0;
  	zps_failure_reason = reason;
  	zps_api_failure_reason = api_reason?api_reason:reason;
  	zend_llist_del_element(&zend_extensions, NULL, (int (*)(void *, void *))cb);
  }
  
  static inline int accel_find_sapi(void)
  {
  	static const char *supported_sapis[] = {
  		"apache",
  		"fastcgi",
  		"cli-server",
  		"cgi-fcgi",
  		"fpm-fcgi",
  		"isapi",
  		"apache2filter",
  		"apache2handler",
  		"litespeed",
  		NULL
  	};
  	const char **sapi_name;
  
  	if (sapi_module.name) {
  		for (sapi_name = supported_sapis; *sapi_name; sapi_name++) {
  			if (strcmp(sapi_module.name, *sapi_name) == 0) {
  				return SUCCESS;
  			}
  		}
  		if (ZCG(accel_directives).enable_cli && (
  		    strcmp(sapi_module.name, "cli") == 0
  		  || strcmp(sapi_module.name, "phpdbg") == 0)) {
  			return SUCCESS;
  		}
  	}
  
  	return FAILURE;
  }
  
  static int zend_accel_init_shm(void)
  {
  	zend_shared_alloc_lock();
  
  	accel_shared_globals = zend_shared_alloc(sizeof(zend_accel_shared_globals));
  	if (!accel_shared_globals) {
  		zend_accel_error(ACCEL_LOG_FATAL, "Insufficient shared memory!");
  		zend_shared_alloc_unlock();
  		return FAILURE;
  	}
  	ZSMMG(app_shared_globals) = accel_shared_globals;
  
  	zend_accel_hash_init(&ZCSG(hash), ZCG(accel_directives).max_accelerated_files);
  
  	ZCSG(interned_strings_start) = ZCSG(interned_strings_end) = NULL;
  # ifndef ZTS
  	zend_hash_init(&ZCSG(interned_strings), (ZCG(accel_directives).interned_strings_buffer * 1024 * 1024) / (sizeof(Bucket) + sizeof(Bucket*) + 8 /* average string length */), NULL, NULL, 1);
  	if (ZCG(accel_directives).interned_strings_buffer) {
  		void *data;
  
  		ZCSG(interned_strings).nTableMask = -ZCSG(interned_strings).nTableSize;
  		data = zend_shared_alloc(HT_SIZE(&ZCSG(interned_strings)));
  		ZCSG(interned_strings_start) = zend_shared_alloc((ZCG(accel_directives).interned_strings_buffer * 1024 * 1024));
  		if (!data || !ZCSG(interned_strings_start)) {
  			zend_accel_error(ACCEL_LOG_FATAL, ACCELERATOR_PRODUCT_NAME " cannot allocate buffer for interned strings");
  			zend_shared_alloc_unlock();
  			return FAILURE;
  		}
  		HT_SET_DATA_ADDR(&ZCSG(interned_strings), data);
  		HT_HASH_RESET(&ZCSG(interned_strings));
  		ZCSG(interned_strings_end)   = ZCSG(interned_strings_start) + (ZCG(accel_directives).interned_strings_buffer * 1024 * 1024);
  		ZCSG(interned_strings_top)   = ZCSG(interned_strings_start);
  
  //		orig_interned_strings_start = CG(interned_strings_start);
  //		orig_interned_strings_end = CG(interned_strings_end);
  //		CG(interned_strings_start) = ZCSG(interned_strings_start);
  //		CG(interned_strings_end) = ZCSG(interned_strings_end);
  	}
  # endif
  
  	orig_new_interned_string = zend_new_interned_string;
  	orig_interned_strings_snapshot = zend_interned_strings_snapshot;
  	orig_interned_strings_restore = zend_interned_strings_restore;
  	zend_new_interned_string = accel_new_interned_string_for_php;
  	zend_interned_strings_snapshot = accel_interned_strings_snapshot_for_php;
  	zend_interned_strings_restore = accel_interned_strings_restore_for_php;
  
  # ifndef ZTS
  	if (ZCG(accel_directives).interned_strings_buffer) {
  		accel_use_shm_interned_strings();
  		accel_interned_strings_save_state();
  	}
  # endif
  
  	zend_reset_cache_vars();
  
  	ZCSG(oom_restarts) = 0;
  	ZCSG(hash_restarts) = 0;
  	ZCSG(manual_restarts) = 0;
  
  	ZCSG(accelerator_enabled) = 1;
  	ZCSG(start_time) = zend_accel_get_time();
  	ZCSG(last_restart_time) = 0;
  	ZCSG(restart_in_progress) = 0;
  
  	zend_shared_alloc_unlock();
  
  	return SUCCESS;
  }
  
  static void accel_globals_ctor(zend_accel_globals *accel_globals)
  {
  #if defined(COMPILE_DL_OPCACHE) && defined(ZTS)
  	ZEND_TSRMLS_CACHE_UPDATE();
  #endif
  	memset(accel_globals, 0, sizeof(zend_accel_globals));
  }
  
  static void accel_globals_internal_func_dtor(zval *zv)
  {
  	free(Z_PTR_P(zv));
  }
  
  static void accel_globals_dtor(zend_accel_globals *accel_globals)
  {
  	if (accel_globals->function_table.nTableSize) {
  		accel_globals->function_table.pDestructor = accel_globals_internal_func_dtor;
  		zend_hash_destroy(&accel_globals->function_table);
  	}
  }
  
  #define ZEND_BIN_ID "BIN_" ZEND_TOSTR(SIZEOF_CHAR) ZEND_TOSTR(SIZEOF_INT) ZEND_TOSTR(SIZEOF_LONG) ZEND_TOSTR(SIZEOF_SIZE_T) ZEND_TOSTR(SIZEOF_ZEND_LONG) ZEND_TOSTR(ZEND_MM_ALIGNMENT)
  
  static void accel_gen_system_id(void)
  {
  	PHP_MD5_CTX context;
  	unsigned char digest[16], c;
  	char *md5str = ZCG(system_id);
  	int i;
  
  	PHP_MD5Init(&context);
  	PHP_MD5Update(&context, PHP_VERSION, sizeof(PHP_VERSION)-1);
  	PHP_MD5Update(&context, ZEND_EXTENSION_BUILD_ID, sizeof(ZEND_EXTENSION_BUILD_ID)-1);
  	PHP_MD5Update(&context, ZEND_BIN_ID, sizeof(ZEND_BIN_ID)-1);
  	if (strstr(PHP_VERSION, "-dev") != 0) {
  		/* Development versions may be changed from build to build */
  		PHP_MD5Update(&context, __DATE__, sizeof(__DATE__)-1);
  		PHP_MD5Update(&context, __TIME__, sizeof(__TIME__)-1);
  	}
  	PHP_MD5Final(digest, &context);
  	for (i = 0; i < 16; i++) {
  		c = digest[i] >> 4;
  		c = (c <= 9) ? c + '0' : c - 10 + 'a';
  		md5str[i * 2] = c;
  		c = digest[i] &  0x0f;
  		c = (c <= 9) ? c + '0' : c - 10 + 'a';
  		md5str[(i * 2) + 1] = c;
  	}
  }
  
  #ifdef HAVE_HUGE_CODE_PAGES
  # ifndef _WIN32
  #  include <sys/mman.h>
  #  ifndef MAP_ANON
  #   ifdef MAP_ANONYMOUS
  #    define MAP_ANON MAP_ANONYMOUS
  #   endif
  #  endif
  #  ifndef MAP_FAILED
  #   define MAP_FAILED ((void*)-1)
  #  endif
  # endif
  
  # if defined(MAP_HUGETLB) || defined(MADV_HUGEPAGE)
  static int accel_remap_huge_pages(void *start, size_t size, const char *name, size_t offset)
  {
  	void *ret = MAP_FAILED;
  	void *mem;
  
  	mem = mmap(NULL, size,
  		PROT_READ | PROT_WRITE,
  		MAP_PRIVATE | MAP_ANONYMOUS,
  		-1, 0);
  	if (mem == MAP_FAILED) {
  		zend_error(E_WARNING,
  			ACCELERATOR_PRODUCT_NAME " huge_code_pages: mmap failed: %s (%d)",
  			strerror(errno), errno);
  		return -1;
  	}
  	memcpy(mem, start, size);
  
  #  ifdef MAP_HUGETLB
  	ret = mmap(start, size,
  		PROT_READ | PROT_WRITE | PROT_EXEC,
  		MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED | MAP_HUGETLB,
  		-1, 0);
  #  endif
  	if (ret == MAP_FAILED) {
  		ret = mmap(start, size,
  			PROT_READ | PROT_WRITE | PROT_EXEC,
  			MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED,
  			-1, 0);
  		/* this should never happen? */
  		ZEND_ASSERT(ret != MAP_FAILED);
  #  ifdef MADV_HUGEPAGE
  		if (-1 == madvise(start, size, MADV_HUGEPAGE)) {
  			memcpy(start, mem, size);
  			mprotect(start, size, PROT_READ | PROT_EXEC);
  			munmap(mem, size);
  			zend_error(E_WARNING,
  				ACCELERATOR_PRODUCT_NAME " huge_code_pages: madvise(HUGEPAGE) failed: %s (%d)",
  				strerror(errno), errno);
  			return -1;
  		}
  #  else
  		memcpy(start, mem, size);
  		mprotect(start, size, PROT_READ | PROT_EXEC);
  		munmap(mem, size);
  		zend_error(E_WARNING,
  			ACCELERATOR_PRODUCT_NAME " huge_code_pages: mmap(HUGETLB) failed: %s (%d)",
  			strerror(errno), errno);
  		return -1;
  #  endif
  	}
  
  	if (ret == start) {
  		memcpy(start, mem, size);
  		mprotect(start, size, PROT_READ | PROT_EXEC);
  	}
  	munmap(mem, size);
  
  	return (ret == start) ? 0 : -1;
  }
  
  static void accel_move_code_to_huge_pages(void)
  {
  	FILE *f;
  	long unsigned int huge_page_size = 2 * 1024 * 1024;
  
  	f = fopen("/proc/self/maps", "r");
  	if (f) {
  		long unsigned int  start, end, offset, inode;
  		char perm[5], dev[6], name[MAXPATHLEN];
  		int ret;
  
  		ret = fscanf(f, "%lx-%lx %4s %lx %5s %ld %s\n", &start, &end, perm, &offset, dev, &inode, name);
  		if (ret == 7 && perm[0] == 'r' && perm[1] == '-' && perm[2] == 'x' && name[0] == '/') {
  			long unsigned int  seg_start = ZEND_MM_ALIGNED_SIZE_EX(start, huge_page_size);
  			long unsigned int  seg_end = (end & ~(huge_page_size-1L));
  
  			if (seg_end > seg_start) {
  				zend_accel_error(ACCEL_LOG_DEBUG, "remap to huge page %lx-%lx %s \n", seg_start, seg_end, name);
  				accel_remap_huge_pages((void*)seg_start, seg_end - seg_start, name, offset + seg_start - start);
  			}
  		}
  		fclose(f);
  	}
  }
  # else
  static void accel_move_code_to_huge_pages(void)
  {
  	zend_error(E_WARNING, ACCELERATOR_PRODUCT_NAME ": opcache.huge_code_pages has no affect as huge page is not supported");
  	return;
  }
  # endif /* defined(MAP_HUGETLB) || defined(MADV_HUGEPAGE) */
  #endif /* HAVE_HUGE_CODE_PAGES */
  
  static int accel_startup(zend_extension *extension)
  {
  	zend_function *func;
  	zend_ini_entry *ini_entry;
  
  #ifdef ZTS
  	accel_globals_id = ts_allocate_id(&accel_globals_id, sizeof(zend_accel_globals), (ts_allocate_ctor) accel_globals_ctor, (ts_allocate_dtor) accel_globals_dtor);
  #else
  	accel_globals_ctor(&accel_globals);
  #endif
  
  #ifdef ZEND_WIN32
  	_setmaxstdio(2048); /* The default configuration is limited to 512 stdio files */
  #endif
  
  	if (start_accel_module() == FAILURE) {
  		accel_startup_ok = 0;
  		zend_error(E_WARNING, ACCELERATOR_PRODUCT_NAME ": module registration failed!");
  		return FAILURE;
  	}
  
  	accel_gen_system_id();
  
  #ifdef HAVE_HUGE_CODE_PAGES
  	if (ZCG(accel_directives).huge_code_pages &&
  	    (strcmp(sapi_module.name, "cli") == 0 ||
  	     strcmp(sapi_module.name, "cli-server") == 0 ||
  		 strcmp(sapi_module.name, "cgi-fcgi") == 0 ||
  		 strcmp(sapi_module.name, "fpm-fcgi") == 0)) {
  		accel_move_code_to_huge_pages();
  	}
  #endif
  
  	/* no supported SAPI found - disable acceleration and stop initialization */
  	if (accel_find_sapi() == FAILURE) {
  		accel_startup_ok = 0;
  		if (!ZCG(accel_directives).enable_cli &&
  		    strcmp(sapi_module.name, "cli") == 0) {
  			zps_startup_failure("Opcode Caching is disabled for CLI", NULL, accelerator_remove_cb);
  		} else {
  			zps_startup_failure("Opcode Caching is only supported in Apache, ISAPI, FPM, FastCGI and LiteSpeed SAPIs", NULL, accelerator_remove_cb);
  		}
  		return SUCCESS;
  	}
  
  	if (ZCG(enabled) == 0) {
  		return SUCCESS ;
  	}
  
  /********************************************/
  /* End of non-SHM dependent initializations */
  /********************************************/
  #ifdef HAVE_OPCACHE_FILE_CACHE
  	if (!ZCG(accel_directives).file_cache_only) {
  #else
  	if (1) {
  #endif
  		switch (zend_shared_alloc_startup(ZCG(accel_directives).memory_consumption)) {
  			case ALLOC_SUCCESS:
  				if (zend_accel_init_shm() == FAILURE) {
  					accel_startup_ok = 0;
  					return FAILURE;
  				}
  				break;
  			case ALLOC_FAILURE:
  				accel_startup_ok = 0;
  				zend_accel_error(ACCEL_LOG_FATAL, "Failure to initialize shared memory structures - probably not enough shared memory.");
  				return SUCCESS;
  			case SUCCESSFULLY_REATTACHED:
  				zend_shared_alloc_lock();
  				accel_shared_globals = (zend_accel_shared_globals *) ZSMMG(app_shared_globals);
  				orig_new_interned_string = zend_new_interned_string;
  				orig_interned_strings_snapshot = zend_interned_strings_snapshot;
  				orig_interned_strings_restore = zend_interned_strings_restore;
  
  				zend_new_interned_string = accel_new_interned_string_for_php;
  				zend_interned_strings_snapshot = accel_interned_strings_snapshot_for_php;
  				zend_interned_strings_restore = accel_interned_strings_restore_for_php;
  #ifndef ZTS
  				accel_use_shm_interned_strings();
  #endif
  				zend_shared_alloc_unlock();
  				break;
  			case FAILED_REATTACHED:
  				accel_startup_ok = 0;
  				zend_accel_error(ACCEL_LOG_FATAL, "Failure to initialize shared memory structures - can not reattach to exiting shared memory.");
  				return SUCCESS;
  				break;
  #if ENABLE_FILE_CACHE_FALLBACK
  			case ALLOC_FALLBACK:
  				zend_shared_alloc_lock();
  				fallback_process = 1;
  				zend_accel_init_auto_globals();
  				zend_shared_alloc_unlock();
  				goto file_cache_fallback;
  				break;
  #endif
  		}
  
  		/* from this point further, shared memory is supposed to be OK */
  
  		/* remeber the last restart time in the process memory */
  		ZCG(last_restart_time) = ZCSG(last_restart_time);
  
  		/* Init auto-global strings */
  		zend_accel_init_auto_globals();
  
  		zend_shared_alloc_lock();
  		zend_shared_alloc_save_state();
  		zend_shared_alloc_unlock();
  
  		SHM_PROTECT();
  #ifdef HAVE_OPCACHE_FILE_CACHE
  	} else if (!ZCG(accel_directives).file_cache) {
  		accel_startup_ok = 0;
  		zend_accel_error(ACCEL_LOG_FATAL, "opcache.file_cache_only is set without a proper setting of opcache.file_cache");
  		return SUCCESS;
  	} else {
  		accel_shared_globals = calloc(1, sizeof(zend_accel_shared_globals));
  
  		/* Init auto-global strings */
  		zend_accel_init_auto_globals();
  #endif
  	}
  #if ENABLE_FILE_CACHE_FALLBACK
  file_cache_fallback:
  #endif
  
  	/* Override compiler */
  	accelerator_orig_compile_file = zend_compile_file;
  	zend_compile_file = persistent_compile_file;
  
  	/* Override stream opener function (to eliminate open() call caused by
  	 * include/require statements ) */
  	accelerator_orig_zend_stream_open_function = zend_stream_open_function;
  	zend_stream_open_function = persistent_stream_open_function;
  
  	/* Override path resolver function (to eliminate stat() calls caused by
  	 * include_once/require_once statements */
  	accelerator_orig_zend_resolve_path = zend_resolve_path;
  	zend_resolve_path = persistent_zend_resolve_path;
  
  	/* Override chdir() function */
  	if ((func = zend_hash_str_find_ptr(CG(function_table), "chdir", sizeof("chdir")-1)) != NULL &&
  	    func->type == ZEND_INTERNAL_FUNCTION) {
  		orig_chdir = func->internal_function.handler;
  		func->internal_function.handler = ZEND_FN(accel_chdir);
  	}
  	ZCG(cwd) = NULL;
  	ZCG(include_path) = NULL;
  
  	/* Override "include_path" modifier callback */
  	if ((ini_entry = zend_hash_str_find_ptr(EG(ini_directives), "include_path", sizeof("include_path")-1)) != NULL) {
  		ZCG(include_path) = ini_entry->value;
  		orig_include_path_on_modify = ini_entry->on_modify;
  		ini_entry->on_modify = accel_include_path_on_modify;
  	}
  
  	accel_startup_ok = 1;
  
  	/* Override file_exists(), is_file() and is_readable() */
  	zend_accel_override_file_functions();
  
  	/* Load black list */
  	accel_blacklist.entries = NULL;
  	if (ZCG(enabled) && accel_startup_ok &&
  	    ZCG(accel_directives).user_blacklist_filename &&
  	    *ZCG(accel_directives.user_blacklist_filename)) {
  		zend_accel_blacklist_init(&accel_blacklist);
  		zend_accel_blacklist_load(&accel_blacklist, ZCG(accel_directives.user_blacklist_filename));
  	}
  
  	return SUCCESS;
  }
  
  static void accel_free_ts_resources()
  {
  #ifndef ZTS
  	accel_globals_dtor(&accel_globals);
  #else
  	ts_free_id(accel_globals_id);
  #endif
  }
  
  void accel_shutdown(void)
  {
  	zend_ini_entry *ini_entry;
  	zend_bool file_cache_only = 0;
  
  	zend_accel_blacklist_shutdown(&accel_blacklist);
  
  	if (!ZCG(enabled) || !accel_startup_ok) {
  		accel_free_ts_resources();
  		return;
  	}
  
  	if (ZCG(accel_directives).interned_strings_buffer) {
  #ifndef ZTS
  		zend_hash_clean(CG(auto_globals));
  		zend_hash_clean(CG(function_table));
  		zend_hash_clean(CG(class_table));
  		zend_hash_clean(EG(zend_constants));
  #endif
  	}
  
  	accel_reset_pcre_cache();
  
  	zend_new_interned_string = orig_new_interned_string;
  	zend_interned_strings_snapshot = orig_interned_strings_snapshot;
  	zend_interned_strings_restore = orig_interned_strings_restore;
  
  #ifdef HAVE_OPCACHE_FILE_CACHE
  	file_cache_only = ZCG(accel_directives).file_cache_only;
  #endif
  
  	accel_free_ts_resources();
  
  	if (!file_cache_only) {
  		zend_shared_alloc_shutdown();
  	}
  	zend_compile_file = accelerator_orig_compile_file;
  
  	if ((ini_entry = zend_hash_str_find_ptr(EG(ini_directives), "include_path", sizeof("include_path")-1)) != NULL) {
  		ini_entry->on_modify = orig_include_path_on_modify;
  	}
  }
  
  void zend_accel_schedule_restart(zend_accel_restart_reason reason)
  {
  	if (ZCSG(restart_pending)) {
  		/* don't schedule twice */
  		return;
  	}
  	zend_accel_error(ACCEL_LOG_DEBUG, "Restart Scheduled!");
  
  	SHM_UNPROTECT();
  	ZCSG(restart_pending) = 1;
  	ZCSG(restart_reason) = reason;
  	ZCSG(cache_status_before_restart) = ZCSG(accelerator_enabled);
  	ZCSG(accelerator_enabled) = 0;
  
  	if (ZCG(accel_directives).force_restart_timeout) {
  		ZCSG(force_restart_time) = zend_accel_get_time() + ZCG(accel_directives).force_restart_timeout;
  	} else {
  		ZCSG(force_restart_time) = 0;
  	}
  	SHM_PROTECT();
  }
  
  /* this is needed because on WIN32 lock is not decreased unless ZCG(counted) is set */
  #ifdef ZEND_WIN32
  #define accel_deactivate_now() ZCG(counted) = 1; accel_deactivate_sub()
  #else
  #define accel_deactivate_now() accel_deactivate_sub()
  #endif
  
  /* ensures it is OK to read SHM
  	if it's not OK (restart in progress) returns FAILURE
  	if OK returns SUCCESS
  	MUST call accelerator_shm_read_unlock after done lock operations
  */
  int accelerator_shm_read_lock(void)
  {
  	if (ZCG(counted)) {
  		/* counted means we are holding read lock for SHM, so that nothing bad can happen */
  		return SUCCESS;
  	} else {
  		/* here accelerator is active but we do not hold SHM lock. This means restart was scheduled
  			or is in progress now */
  		accel_activate_add(); /* acquire usage lock */
  		/* Now if we weren't inside restart, restart would not begin until we remove usage lock */
  		if (ZCSG(restart_in_progress)) {
  			/* we already were inside restart this means it's not safe to touch shm */
  			accel_deactivate_now(); /* drop usage lock */
  			return FAILURE;
  		}
  	}
  	return SUCCESS;
  }
  
  /* must be called ONLY after SUCCESSFUL accelerator_shm_read_lock */
  void accelerator_shm_read_unlock(void)
  {
  	if (!ZCG(counted)) {
  		/* counted is 0 - meaning we had to readlock manually, release readlock now */
  		accel_deactivate_now();
  	}
  }
  
  ZEND_EXT_API zend_extension zend_extension_entry = {
  	ACCELERATOR_PRODUCT_NAME,               /* name */
  	ACCELERATOR_VERSION,					/* version */
  	"Zend Technologies",					/* author */
  	"http://www.zend.com/",					/* URL */
  	"Copyright (c) 1999-2015",				/* copyright */
  	accel_startup,					   		/* startup */
  	NULL,									/* shutdown */
  	accel_activate,							/* per-script activation */
  	accel_deactivate,						/* per-script deactivation */
  	NULL,									/* message handler */
  	NULL,									/* op_array handler */
  	NULL,									/* extended statement handler */
  	NULL,									/* extended fcall begin handler */
  	NULL,									/* extended fcall end handler */
  	NULL,									/* op_array ctor */
  	NULL,									/* op_array dtor */
  	STANDARD_ZEND_EXTENSION_PROPERTIES
  };
  